Elementary Technical Mathematics
11th Edition
ISBN: 9781285199191
Author: Dale Ewen, C. Robert Nelson
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 7, Problem 17R
A crew of electricians can wire 6 houses in 144 h. How many hours will it take them to wire 9 houses?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
A random variable X takes values 0 and 1 with probabilities q and p, respectively, with q+p=1. find the moment generating function of X and show that all the moments about the origin equal p. (Note- Please include as much detailed solution/steps in the solution to understand, Thank you!)
1 (Expected Shortfall)
Suppose the price of an asset Pt follows a normal random walk, i.e., Pt =
Po+r₁ + ... + rt with r₁, r2,... being IID N(μ, o²).
Po+r1+.
⚫ Suppose the VaR of rt is VaRq(rt) at level q, find the VaR of the price
in T days, i.e., VaRq(Pt – Pt–T).
-
• If ESq(rt) = A, find ES₁(Pt – Pt–T).
2 (Normal Distribution)
Let rt be a log return. Suppose that r₁, 2, ... are IID N(0.06, 0.47).
What is the distribution of rt (4) = rt + rt-1 + rt-2 + rt-3?
What is P(rt (4) < 2)?
What is the covariance between r2(2) = 1 + 12 and 13(2) = r² + 13?
• What is the conditional distribution of r₁(3) = rt + rt-1 + rt-2 given
rt-2 = 0.6?
Chapter 7 Solutions
Elementary Technical Mathematics
Ch. 7.1 - Express each ratio in lowest terms: 3 to 15Ch. 7.1 - Express each ratio in lowest terms: 6:12Ch. 7.1 - Express each ratio in lowest terms: 7:21Ch. 7.1 - Express each ratio in lowest terms: 422Ch. 7.1 - Prob. 5ECh. 7.1 - Prob. 6ECh. 7.1 - Prob. 7ECh. 7.1 - Express each ratio in lowest terms: 3 ft to 15 in.Ch. 7.1 - Express each ratio in lowest terms: 3 cm to 15 mmCh. 7.1 - Express each ratio in lowest terms: 1 in. to 8 ft
Ch. 7.1 - Prob. 11ECh. 7.1 - Prob. 12ECh. 7.1 - Prob. 13ECh. 7.1 - Prob. 14ECh. 7.1 - Prob. 15ECh. 7.1 - Express each ratio in lowest terms: 6 to 423Ch. 7.1 - Express each ratio in lowest terms: 513223Ch. 7.1 - Express each ratio in lowest terms: 1812214Ch. 7.1 - Express each ratio in lowest terms: 10 to 212Ch. 7.1 - Express each ratio in lowest terms: 78:916Ch. 7.1 - Express each ratio in lowest terms: 312 to 212Ch. 7.1 - Express each ratio in lowest terms: 223:334Ch. 7.1 - Prob. 23ECh. 7.1 - Prob. 24ECh. 7.1 - Express each rate in lowest terms: 240mi8galCh. 7.1 - Express each rate in lowest terms: 360mi18acresCh. 7.1 - Prob. 27ECh. 7.1 - Prob. 28ECh. 7.1 - Express each rate in lowest terms: 625mi1212hCh. 7.1 - Prob. 30ECh. 7.1 - Express each rate in lowest terms: 214lb6galCh. 7.1 - Prob. 32ECh. 7.1 - A bearing bronze mix includes 96 lb of copper and...Ch. 7.1 - What is the alternator-to-engine drive ratio if...Ch. 7.1 - A technician measured an oil flow rate of 90 gal...Ch. 7.1 - A flywheel has 72 teeth, and a starter drive-gear...Ch. 7.1 - Prob. 37ECh. 7.1 - Prob. 38ECh. 7.1 - Prob. 39ECh. 7.1 - The resistance in ohms of a resistor is the ratio...Ch. 7.1 - A 150-bu wagon holds 2.7 tons of grain. Express...Ch. 7.1 - The total yield from a 55-acre field is 7425 bu....Ch. 7.1 - A 350-gal spray tank covers 14 acres. Find the...Ch. 7.1 - Suppose 12 gal of herbicide concentrate are used...Ch. 7.1 - A flower bed contains a mixture of 6 ft3 of...Ch. 7.1 - Prob. 46ECh. 7.1 - Suppose 16 ft of copper tubing costs $27.04. Find...Ch. 7.1 - A structure has 3290 ft2 of wall area (excluding...Ch. 7.1 - A 2150-ft2 home sells for $268,750. Find the ratio...Ch. 7.1 - You need 15 ft3 of cement to make 80 ft3 of...Ch. 7.1 - A welder has 9 pieces of 4-ft steel angle and 12...Ch. 7.1 - A welder grabs a handful of 6011 welding rods and...Ch. 7.1 - The total number of hours required for a private-...Ch. 7.1 - Two small window air conditioner units were...Ch. 7.1 - A 1-litre (1000 mL) IV bag of dextrose solution...Ch. 7.1 - Over a period of 5 h, 1200 mL of an IV solution...Ch. 7.1 - Prob. 57ECh. 7.1 - Prob. 58ECh. 7.1 - Prob. 59ECh. 7.1 - In tilapia fish farming, 5 tons of high-quality...Ch. 7.1 - Find the flow rate for each given IV (assume a...Ch. 7.1 - Prob. 62ECh. 7.1 - Find the flow rate for each given IV (assume a...Ch. 7.1 - Find the flow rate for each given IV (assume a...Ch. 7.1 - Find the length of time each IV should be...Ch. 7.1 - Prob. 66ECh. 7.1 - Prob. 67ECh. 7.1 - Prob. 68ECh. 7.1 - Prob. 69ECh. 7.1 - Ann worked 6 hours and her pay was $54.60. What...Ch. 7.1 - Prob. 71ECh. 7.1 - Prob. 72ECh. 7.1 - A recipe calls for 1 gal of tomato paste and 3 qt...Ch. 7.1 - The soup of the day has water as 35% of its volume...Ch. 7.1 - Prob. 75ECh. 7.1 - 18 lb of potatoes are used in a recipe for 42...Ch. 7.2 - In each proportion, find a. the means, b. the...Ch. 7.2 - In each proportion, find a. the means, b. the...Ch. 7.2 - In each proportion, find a. the means, b. the...Ch. 7.2 - In each proportion, find a. the means, b. the...Ch. 7.2 - Prob. 5ECh. 7.2 - Prob. 6ECh. 7.2 - Determine whether or not each pair of rations is...Ch. 7.2 - Determine whether or not each pair of rations is...Ch. 7.2 - Determine whether or not each pair of rations is...Ch. 7.2 - Determine whether or not each pair of rations is...Ch. 7.2 - Determine whether or not each pair of rations is...Ch. 7.2 - Prob. 12ECh. 7.2 - Prob. 13ECh. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Prob. 15ECh. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Prob. 32ECh. 7.2 - Prob. 33ECh. 7.2 - Prob. 34ECh. 7.2 - Prob. 35ECh. 7.2 - Prob. 36ECh. 7.2 - Prob. 37ECh. 7.2 - Prob. 38ECh. 7.2 - Prob. 39ECh. 7.2 - Prob. 40ECh. 7.2 - Solve each proportion (round each result to three...Ch. 7.2 - Prob. 42ECh. 7.2 - You need 234ft3 of sand to make 8 ft3 of concrete....Ch. 7.2 - Prob. 44ECh. 7.2 - A builder sells an 1800-ft2 home for $171,000....Ch. 7.2 - Suppose 826 bricks are used in constructing a wall...Ch. 7.2 - Prob. 47ECh. 7.2 - A salesperson is paid a commission of $75 for...Ch. 7.2 - A plane flies for 3 h and uses 25 gal of 100LL...Ch. 7.2 - Metal duct that is 6 in. in diameter costs $7.50...Ch. 7.2 - Suppose 20 gal of water and 3 lb of pesticide are...Ch. 7.2 - A farmer uses 150 lb of a chemical on a 40-acre...Ch. 7.2 - Suppose a yield of 100 bu of corn per acre removes...Ch. 7.2 - Prob. 54ECh. 7.2 - An orchard has 3 rows with 5 apple trees each. The...Ch. 7.2 - A 25-lb bag of fertilizer covers 1200 ft2 of lawn....Ch. 7.2 - Prob. 57ECh. 7.2 - Prob. 58ECh. 7.2 - Prob. 59ECh. 7.2 - If welding rods cost $75 per 50 lb, how much would...Ch. 7.2 - An engine with displacement of 2.0 L develops 270...Ch. 7.2 - Prob. 62ECh. 7.2 - An automobile uses 18 gal of fuel to go 560 mi....Ch. 7.2 - A fuel pump delivers 35 mL of fuel in 420 strokes....Ch. 7.2 - A label reads: 2.5 mL of solution for injection...Ch. 7.2 - Prob. 66ECh. 7.2 - You are to administer 150 mg of aminophylline from...Ch. 7.2 - Prob. 68ECh. 7.2 - When finding the percent, round to the nearest...Ch. 7.2 - When finding the percent, round to the nearest...Ch. 7.2 - Prob. 71ECh. 7.2 - When finding the percent, round to the nearest...Ch. 7.2 - When finding the percent, round to the nearest...Ch. 7.2 - Prob. 74ECh. 7.2 - When finding the percent, round to the nearest...Ch. 7.2 - Prob. 76ECh. 7.2 - When finding the percent, round to the nearest...Ch. 7.2 - Prob. 78ECh. 7.2 - Prob. 79ECh. 7.2 - Prob. 80ECh. 7.2 - Prob. 81ECh. 7.2 - Prob. 82ECh. 7.2 - Find the number of millilitres of pure ingredient...Ch. 7.2 - Prob. 84ECh. 7.2 - Prob. 85ECh. 7.2 - Prob. 86ECh. 7.2 - Prob. 87ECh. 7.2 - Prob. 88ECh. 7.2 - Prob. 89ECh. 7.2 - Prob. 90ECh. 7.2 - The ratio of beef to pork for meat loaf is 5:2....Ch. 7.2 - Prob. 92ECh. 7.2 - The following recipe is for sherry vinegar...Ch. 7.2 - Prob. 94ECh. 7.2 - The following recipe is for 16 crepes: 14 cup...Ch. 7.2 - Prob. 96ECh. 7.2 - Prob. 97ECh. 7.2 - Prob. 98ECh. 7.2 - The kitchen ratio of ingredients for tenderloin of...Ch. 7.2 - Prob. 100ECh. 7.3 - Use the map in Figure 7.2 (page 266) to find the...Ch. 7.3 - Prob. 2ECh. 7.3 - Use the map in Figure 7.2 (page 266) to find the...Ch. 7.3 - Prob. 4ECh. 7.3 - Prob. 5ECh. 7.3 - Prob. 6ECh. 7.3 - Prob. 7ECh. 7.3 - Prob. 8ECh. 7.3 - Use the map in Figure 7.2 (page 266) to find the...Ch. 7.3 - Prob. 10ECh. 7.3 - Prob. 11ECh. 7.3 - Prob. 12ECh. 7.3 - Prob. 13ECh. 7.3 - Prob. 14ECh. 7.3 - Prob. 15ECh. 7.3 - Prob. 16ECh. 7.3 - Use the scale drawing of a metal plate cover in...Ch. 7.3 - Use the scale drawing of a metal plate cover in...Ch. 7.3 - Use the scale drawing of a metal plate cover in...Ch. 7.3 - Use the scale drawing of a metal plate cover in...Ch. 7.3 - Use the scale drawing of a metal plate cover in...Ch. 7.3 - Use the scale drawing of a metal plate cover in...Ch. 7.3 - Use the scale drawing of a metal plate cover in...Ch. 7.3 - Use the scale drawing of a metal plate cover in...Ch. 7.3 - Use the scale drawing of a metal plate cover in...Ch. 7.3 - Use the formulas for the hydraulic press to find...Ch. 7.3 - Use the formulas for the hydraulic press to find...Ch. 7.3 - Use the formulas for the hydraulic press to find...Ch. 7.3 - Prob. 36ECh. 7.3 - Use the formulas for the hydraulic press to find...Ch. 7.3 - Use the formulas for the hydraulic press to find...Ch. 7.3 - Prob. 39ECh. 7.3 - Use the formulas for the hydraulic press to find...Ch. 7.3 - Use the formulas for the hydraulic press to find...Ch. 7.3 - Prob. 42ECh. 7.3 - Prob. 43ECh. 7.3 - Use the formulas for the hydraulic press to find...Ch. 7.3 - Use the formulas for the hydraulic press to find...Ch. 7.3 - Use the formulas for the hydraulic press to find...Ch. 7.3 - Prob. 47ECh. 7.3 - Prob. 48ECh. 7.3 - Use the formulas for the hydraulic press to find...Ch. 7.3 - Use the formulas for the hydraulic press to find...Ch. 7.3 - Distance and time vary directly when driving at a...Ch. 7.3 - Distance and the amount of gasoline used vary...Ch. 7.3 - The number of patio blocks varies directly with...Ch. 7.3 - The number of people working on a project and the...Ch. 7.4 - Fill in the blanks: Pulley A Pulley B Diameter rpm...Ch. 7.4 - Fill in the blanks: Pulley A Pulley B Diameter rpm...Ch. 7.4 - Prob. 3ECh. 7.4 - Fill in the blanks: Pulley A Pulley B Diameter Rpm...Ch. 7.4 - Prob. 5ECh. 7.4 - Prob. 6ECh. 7.4 - Prob. 7ECh. 7.4 - Fill in the blanks: Pulley A Pulley B Diameter rpm...Ch. 7.4 - A small pulley is 13 in. in diameter, and a larger...Ch. 7.4 - A 21-in. pulley, rotating at 65 rpm, turns a...Ch. 7.4 - A large pulley turns at 48 rpm. A smaller pulley 8...Ch. 7.4 - Prob. 12ECh. 7.4 - A motor turning at 1870 rpm has a 4.0-in.-diameter...Ch. 7.4 - A hydraulic pump is driven with an electric motor...Ch. 7.4 - One pulley is 7 cm larger in diameter than a...Ch. 7.4 - One pulley is twice as large in diameter as a...Ch. 7.4 - Use Illustration 2 for Exercises 1718 ILLUSTRATION...Ch. 7.4 - Use Illustration 2 for Exercises 1718 ILLUSTRATION...Ch. 7.4 - Use Illustration 3 for Exercises 1920. Note:...Ch. 7.4 - Use Illustration 3 for Exercises 1920. Note:...Ch. 7.4 - Prob. 21ECh. 7.4 - Prob. 22ECh. 7.4 - Prob. 23ECh. 7.4 - Fill in the blanks: Gear A Gear B Number of teeth...Ch. 7.4 - Fill in the blanks: Gear A Gear B Number of teeth...Ch. 7.4 - Prob. 26ECh. 7.4 - A small gear with 25 teeth turns a large gear with...Ch. 7.4 - A large gear with 180 teeth running at 600 rpm...Ch. 7.4 - Prob. 29ECh. 7.4 - Prob. 30ECh. 7.4 - Prob. 31ECh. 7.4 - Prob. 32ECh. 7.4 - Complete the table F1 d1 F2 d2 18 lb 5 in. 9 lbCh. 7.4 - Prob. 34ECh. 7.4 - Prob. 35ECh. 7.4 - Prob. 36ECh. 7.4 - In Exercises 3337, draw a sketch for each and...Ch. 7.4 - A block of steel weighing 1800 lb is to be raised...Ch. 7.4 - A rocker arm raises oil from an oil well. On each...Ch. 7.4 - A carpenter needs to raise one side of a building...Ch. 7.4 - A 1200-g mass is placed 72 cm from the fulcrum of...Ch. 7.4 - Prob. 42ECh. 7.4 - Prob. 43ECh. 7.4 - A piece of machinery weighs 3 tons. It is to be...Ch. 7.4 - The length and width vary inversely in a rectangle...Ch. 7.4 - The speed and time of travel vary inversely when...Ch. 7.4 - Prob. 47ECh. 7.4 - Prob. 48ECh. 7 - Write each ratio in lowest terms: 7 to 28Ch. 7 - Write each ratio in lowest terms: 60:40Ch. 7 - Write each ratio in lowest terms: 1 g to 500 mgCh. 7 - Write each ratio in lowest terms: 5ft6in.9ftCh. 7 - Prob. 5RCh. 7 - Prob. 6RCh. 7 - Prob. 7RCh. 7 - Prob. 8RCh. 7 - Prob. 9RCh. 7 - Prob. 10RCh. 7 - Prob. 11RCh. 7 - Prob. 12RCh. 7 - Prob. 13RCh. 7 - Prob. 14RCh. 7 - A piece of cable 180 ft long costs $67.50. How...Ch. 7 - A copper wire 750 ft long has a resistance of 1.89...Ch. 7 - A crew of electricians can wire 6 houses in 144 h....Ch. 7 - An automobile braking system has a 12-to-1 lever...Ch. 7 - Jones invests $6380 and Hernandez invests $4620 in...Ch. 7 - Prob. 20RCh. 7 - Prob. 21RCh. 7 - Prob. 22RCh. 7 - Prob. 23RCh. 7 - Prob. 24RCh. 7 - Prob. 25RCh. 7 - Prob. 26RCh. 7 - Prob. 27RCh. 7 - An object 9 ft from the fulcrum of a lever...Ch. 7 - Prob. 29RCh. 7 - The number of workers needed to complete a...Ch. 7 - Prob. 1TCh. 7 - Prob. 2TCh. 7 - Write each ratio in lowest terms: 400 mL to 5 LCh. 7 - Prob. 4TCh. 7 - Prob. 5TCh. 7 - Prob. 6TCh. 7 - If 60 ft of fencing costs $138, how much does 80...Ch. 7 - Five quarts of pure antifreeze are added to 10...Ch. 7 - The scale on a map is 1 cm = 10 km. If two cities...Ch. 7 - A used automobile sells for $7500. The down...Ch. 7 - A small gear with 36 teeth turns a large gear with...Ch. 7 - A pulley is 20 cm in diameter and rotating at 150...Ch. 7 - Given the lever formula, F1d1=F2d2, and F1=800 lb,...Ch. 7 - A man who weighs 200 lb is to be raised by a lever...
Additional Math Textbook Solutions
Find more solutions based on key concepts
Students in a Listening Responses class bought 40 tickets for a piano concert. The number of tickets purchased ...
Elementary and Intermediate Algebra: Concepts and Applications (7th Edition)
1. How much money is Joe earning when he’s 30?
Pathways To Math Literacy (looseleaf)
The largest polynomial that divides evenly into a list of polynomials is called the _______.
Elementary & Intermediate Algebra
Complete each statement with the correct term from the column on the right. Some of the choices may not be used...
Intermediate Algebra (13th Edition)
True or False The quotient of two polynomial expressions is a rational expression, (p. A35)
Precalculus
Let F be a continuous distribution function. If U is uniformly distributed on (0,1), find the distribution func...
A First Course in Probability (10th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, subject and related others by exploring similar questions and additional content below.Similar questions
- 3 (Sharpe-ratio) Suppose that X1, X2,..., is a lognormal geometric random walk with parameters (μ, o²). Specifically, suppose that X = Xo exp(rı + ...Tk), where Xo is a fixed constant and r1, T2, ... are IID N(μ, o²). Find the Sharpe-ratios of rk and log(Xk) — log(Xo) respectively, assuming the risk free return is 0.arrow_forwardi need help with question 2arrow_forwardNumerical anarrow_forward
- 7 Through the method of inverting the coefficient matrix, solve x+2x=8 2x - y = -5 x+y+z = 4.arrow_forward4 (Value-at-Risk and Expected Shortfall) Suppose X Find VaR0.02(X) and ES0.02 (X). ~ Uniform(-1, 1).arrow_forward亚 ח Variables Name avgdr employ educ exerany Label AVG ALCOHOLIC DRINKS PER DAY IN PAST 30 EMPLOYMENT STATUS EDUCATION LEVEL EXERCISE IN PAST 30 DAYSarrow_forward
- Numerical anaarrow_forwardVariables Name wage hours IQ KWW educ exper tenure age married black south urban sibs brthord meduc feduc Label monthly earnings average weekly hours IQ score knowledge of world work score years of education years of work experience years with current employer age in years =1 if married =1 if black =1 if live in south =1 if live in SMSA number of siblings birth order mother's education father's educationarrow_forwardInformation for questions 4 • • Please Download "wages" from Canvas (the link to this dataset is right below the HWA1 questions - it is a Microsoft excel worksheet) and store it in your favorite folder. It contains 797 observations and 16 variables. The "state" variable gives the names of the states involved in this dataset. • You need to have excel on your computer to open this dataset. i. You should use File > Import > Excel Spreadsheet etc. as done in class 3 convert this file into a Stata dataset. Once you are done, write the final STATA code that makes the transformation of an excel file to a STATA file possible. ii. Write a code that will close the log file that has been open since Question 1 part ii.arrow_forward
- The mean, variance, skewness and kurtosis of a dataset are given as - Mean = 15, Variance = 20, SKewness = 1.5 and Kurtosis = 3.5 calculate the first four raw moments. (Note- Please include as much detailed solution/steps in the solution to understand, Thank you!)arrow_forwardNumerical anaarrow_forwardDon't use chatgpt answer will upvote Already got wrong chatgpt answer .arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Elementary AlgebraAlgebraISBN:9780998625713Author:Lynn Marecek, MaryAnne Anthony-SmithPublisher:OpenStax - Rice UniversityGlencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill
- Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal LittellMathematics For Machine TechnologyAdvanced MathISBN:9781337798310Author:Peterson, John.Publisher:Cengage Learning,
Elementary Algebra
Algebra
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
Publisher:OpenStax - Rice University
Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill
Algebra: Structure And Method, Book 1
Algebra
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:McDougal Littell
Mathematics For Machine Technology
Advanced Math
ISBN:9781337798310
Author:Peterson, John.
Publisher:Cengage Learning,
Use of ALGEBRA in REAL LIFE; Author: Fast and Easy Maths !;https://www.youtube.com/watch?v=9_PbWFpvkDc;License: Standard YouTube License, CC-BY
Compound Interest Formula Explained, Investment, Monthly & Continuously, Word Problems, Algebra; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=P182Abv3fOk;License: Standard YouTube License, CC-BY
Applications of Algebra (Digit, Age, Work, Clock, Mixture and Rate Problems); Author: EngineerProf PH;https://www.youtube.com/watch?v=Y8aJ_wYCS2g;License: Standard YouTube License, CC-BY