Pearson eText for Finite Mathematics & Its Applications -- Instant Access (Pearson+)
12th Edition
ISBN: 9780137442966
Author: Larry Goldstein, David Schneider
Publisher: PEARSON+
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Chapter 3.1, Problem 6E
To determine
To calculate: The value of x from inequality
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Problem 11 (a) A tank is discharging water through an orifice at a depth of T
meter below the surface of the water whose area is A m². The
following are the values of a for the corresponding values of A:
A 1.257 1.390
x 1.50 1.65
1.520 1.650 1.809 1.962 2.123 2.295 2.462|2.650
1.80 1.95 2.10 2.25 2.40 2.55 2.70
2.85
Using the formula
-3.0
(0.018)T =
dx.
calculate T, the time in seconds for the level of the water to drop
from 3.0 m to 1.5 m above the orifice.
(b) The velocity of a train which starts from rest is given by the fol-
lowing table, the time being reckoned in minutes from the start
and the speed in km/hour:
| † (minutes) |2|4 6 8 10 12
14 16 18 20
v (km/hr) 16 28.8 40 46.4 51.2 32.0 17.6 8 3.2 0
Estimate approximately the total distance ran in 20 minutes.
-
Let n = 7, let p = 23 and let S be the set of least positive residues mod p of the first (p − 1)/2
multiple of n, i.e.
n mod p, 2n mod p, ...,
p-1
2
-n mod p.
Let T be the subset of S consisting of those residues which exceed p/2.
Find the set T, and hence compute the Legendre symbol (7|23).
23
32
how come?
The first 11 multiples of 7 reduced mod 23 are
7, 14, 21, 5, 12, 19, 3, 10, 17, 1, 8.
The set T is the subset of these residues exceeding
So T = {12, 14, 17, 19, 21}.
By Gauss' lemma (Apostol Theorem 9.6),
(7|23) = (−1)|T| = (−1)5 = −1.
Let n = 7, let p = 23 and let S be the set of least positive residues mod p of the first (p-1)/2
multiple of n, i.e.
n mod p, 2n mod p, ...,
2
p-1
-n mod p.
Let T be the subset of S consisting of those residues which exceed p/2.
Find the set T, and hence compute the Legendre symbol (7|23).
The first 11 multiples of 7 reduced mod 23 are
7, 14, 21, 5, 12, 19, 3, 10, 17, 1, 8.
23
The set T is the subset of these residues exceeding
2°
So T = {12, 14, 17, 19, 21}.
By Gauss' lemma (Apostol Theorem 9.6),
(7|23) = (−1)|T| = (−1)5 = −1.
how come?
Chapter 3 Solutions
Pearson eText for Finite Mathematics & Its Applications -- Instant Access (Pearson+)
Ch. 3.1 - Graph the inequality 3xy3.Ch. 3.1 - Graph the feasible set for the system of...Ch. 3.1 - In Exercises 1-4, state whether the inequality is...Ch. 3.1 - In Exercises 1-4, state whether the inequality is...Ch. 3.1 - In Exercises 1-4, state whether the inequality is...Ch. 3.1 - In Exercises 1-4, state whether the inequality is...Ch. 3.1 - In Exercises 5-7, solve for x, 2x53Ch. 3.1 - Prob. 6ECh. 3.1 - In Exercises 5-7, solve for x,
7.
Ch. 3.1 - Which of the following results from solving x+13...
Ch. 3.1 - Prob. 9ECh. 3.1 - In Exercises 9-14, write the linear inequality in...Ch. 3.1 - In Exercises 9-14, write the linear inequality in...Ch. 3.1 - In Exercises 9-14, write the linear inequality in...Ch. 3.1 - In Exercises 9-14, write the linear inequality in...Ch. 3.1 - In Exercises 9-14, write the linear inequality in...Ch. 3.1 - In Exercises 15-22, determine whether or not the...Ch. 3.1 - In Exercises 15-22, determine whether or not the...Ch. 3.1 - In Exercises 15-22, determine whether or not the...Ch. 3.1 - In Exercises 15-22, determine whether or not the...Ch. 3.1 - In Exercises 15-22, determine whether or not the...Ch. 3.1 - In Exercises 15-22, determine whether or not the...Ch. 3.1 - Prob. 21ECh. 3.1 - Prob. 22ECh. 3.1 - In Exercises 23-26, graph the given inequality by...Ch. 3.1 - In Exercises 23-26, graph the given inequality by...Ch. 3.1 - Prob. 25ECh. 3.1 - In Exercises 23-26, graph the given inequality by...Ch. 3.1 - In Exercises 27-30, give the linear inequality...Ch. 3.1 - In Exercises 27-30, give the linear inequality...Ch. 3.1 - In Exercises 27-30, give the linear inequality...Ch. 3.1 - In Exercises 27-30, give the linear inequality...Ch. 3.1 - In Exercises 31-42, graph the given inequality....Ch. 3.1 - In Exercises 31-42, graph the given...Ch. 3.1 - In Exercises 31-42, graph the given inequality. x2Ch. 3.1 - In Exercises 31-42, graph the given inequality. x0Ch. 3.1 - In Exercises 31-42, graph the given...Ch. 3.1 - In Exercises 31-42, graph the given inequality....Ch. 3.1 - In Exercises 31-42, graph the given inequality....Ch. 3.1 - In Exercises 31-42, graph the given...Ch. 3.1 - In Exercises 31-42, graph the given inequality....Ch. 3.1 - In Exercises 31-42, graph the given...Ch. 3.1 - In Exercises 31-42, graph the given inequality....Ch. 3.1 - In Exercises 31-42, graph the given inequality....Ch. 3.1 - In Exercises 43-48, graph the feasible set for the...Ch. 3.1 - In Exercises 43-48, graph the feasible set for the...Ch. 3.1 - In Exercises 43-48, graph the feasible set for the...Ch. 3.1 - In Exercises 43-48, graph the feasible set for the...Ch. 3.1 - In Exercises 43-48, graph the feasible set for the...Ch. 3.1 - In Exercises 43-48, graph the feasible set for the...Ch. 3.1 - In Exercises 49-52, determine whether the given...Ch. 3.1 - In Exercises 49-52, determine whether the given...Ch. 3.1 - In Exercises 49-52, determine whether the given...Ch. 3.1 - In Exercises 49-52, determine whether the given...Ch. 3.1 - In Exercises 52-56, determine whether the given...Ch. 3.1 - In Exercises 52-56, determine whether the given...Ch. 3.1 - In Exercises 52-56, determine whether the given...Ch. 3.1 - In Exercises 52-56, determine whether the given...Ch. 3.1 - Give a system of inequalities for which the graph...Ch. 3.1 - The shaded region in Fig. 9 is bounded by four...Ch. 3.1 - The shaded region in Fig. 10 is bounded by four...Ch. 3.1 - Which quadrant if Fig. 11 contains no points that...Ch. 3.1 - Graph the line 4x2y=7. (a) Locate the point on the...Ch. 3.1 - 62. Graph the line
(a) Locate the point on the...Ch. 3.1 - Display the feasible set in Exercise 47.Ch. 3.1 - Display the feasible set in Exercise 48.Ch. 3.2 - 1. Determine whether the following points are in...Ch. 3.2 - A physical fitness enthusiast decides to devote...Ch. 3.2 - Prob. 1ECh. 3.2 - Prob. 2ECh. 3.2 - In Exercises 14, determine whether the given point...Ch. 3.2 - Prob. 4ECh. 3.2 - Manufacturing Consider the furniture manufacturing...Ch. 3.2 - 6. Manufacturing Consider the furniture...Ch. 3.2 - Packaging Joes Confectionary puts together two...Ch. 3.2 - Nutrition-Animal Mr. Holloway decides to feed his...Ch. 3.2 - Shipping A truck traveling from New York to...Ch. 3.2 - 10. Mining A coal company owns mines in two...Ch. 3.2 - 11. Exam Strategy A student is taking an exam...Ch. 3.2 - 12. Political Campaign—Resource Allocation A local...Ch. 3.2 - Nutrition-Dairy Cows A dairy farmer concludes that...Ch. 3.2 - Manufacturing-Resource Allocation A clothing...Ch. 3.3 - The feasible set for the nutrition problem of...Ch. 3.3 - 2. Rework the nutrition problem, assuming that...Ch. 3.3 - For each of the feasible sets in Exercises 1–4,...Ch. 3.3 - For each of the feasible sets in Exercises 14,...Ch. 3.3 - For each of the feasible sets in Exercises 14,...Ch. 3.3 - Prob. 4ECh. 3.3 - In Exercises 58, find the values of x and y that...Ch. 3.3 - In Exercises 58, find the values of x and y that...Ch. 3.3 - In Exercises 58, find the values of x and y that...Ch. 3.3 - In Exercises 5–8, find the values of x and y that...Ch. 3.3 - In Exercises 9–12, find the values of x and y that...Ch. 3.3 - In Exercises 9–12, find the values of x and y that...Ch. 3.3 - In Exercises 9–12, find the values of x and y that...Ch. 3.3 - In Exercises 9–12, find the values of x and y that...Ch. 3.3 - 13. Nutrition—People Consider the nutrition...Ch. 3.3 - 14. Nutrition—People Consider the nutrition...Ch. 3.3 - 15. Packaging Refer to Exercises 3.2, Problem 7....Ch. 3.3 - Nutrition-Animal Refer to Exercises 3.2, Problem...Ch. 3.3 - 17. Shipping Refer to Exercises 3.2, Problem 9....Ch. 3.3 - 18. Mining Refer to Exercises 3.2, Problem 10....Ch. 3.3 - Exam Strategy Refer to Exercises 3.2, Problem 11....Ch. 3.3 - Political Campaign-Resource Allocation Refer to...Ch. 3.3 - 21. Nutrition—Dairy Cows Refer to Exercises 3.2,...Ch. 3.3 - Manufacturing-Resource Allocation Refer to...Ch. 3.3 - Prob. 23ECh. 3.3 - Prob. 24ECh. 3.3 - In Exercises 25–32, find the optimal value for the...Ch. 3.3 - In Exercises 25–32, find the optimal value for the...Ch. 3.3 - In Exercises 2532, find the optimal value for the...Ch. 3.3 - In Exercises 25–32, find the optimal value for the...Ch. 3.3 - In Exercises 25–32, find the optimal value for the...Ch. 3.3 - In Exercises 25–32, find the optimal value for the...Ch. 3.3 - In Exercises 2532, find the optimal value for the...Ch. 3.3 - In Exercises 25–32, find the optimal value for the...Ch. 3.3 - 33. Manufacturing—Resource Allocation Infotron,...Ch. 3.3 - 34. Manufacturing—Production Planning An...Ch. 3.3 - Agriculture-Crop Planning A farmer has 100 acres...Ch. 3.3 - 36. Manufacturing—Resource Allocation A company...Ch. 3.3 - 37. Manufacturing The E-JEM Company produces two...Ch. 3.3 - Refining A refinery has two smelters that extract...Ch. 3.3 - 39. Nutrition—People A nutritionist, working for...Ch. 3.3 - 40. Construction—Resource Allocation A contractor...Ch. 3.3 - 41. Packaging—Product Mix The Beautiful Day Fruit...Ch. 3.3 - 42. Manufacturing—Resource Allocation The Bluejay...Ch. 3.3 - Agriculture-Crop Planning Suppose that the farmer...Ch. 3.3 - 44. Nutrition Pavan wants to add a sliced carrot...Ch. 3.3 - Packaging A small candy shop makes a special Cupid...Ch. 3.3 - Prob. 46ECh. 3.3 - 47. Packaging A bath shop sells two different gift...Ch. 3.3 - Packaging A florist offers two types of Thank You...Ch. 3.3 - Consider the following linear programming problem:...Ch. 3.3 - Consider the following linear programming problem:...Ch. 3.3 - Prob. 51ECh. 3.3 - Use Excel or Wolfram| Alpha to solve Exercise 26.Ch. 3.4 - Problems 1–3 refer to Example 1. Translate the...Ch. 3.4 - Problems 13 refer to Example 1. Translate the...Ch. 3.4 - Problems 13 refer to Example 1. Translate the...Ch. 3.4 - A linear programming problem has objective...Ch. 3.4 - 1. Figure 10(a) shows the feasible set of the...Ch. 3.4 - Figure 10(b) shows the feasible set of the...Ch. 3.4 - Consider the feasible set in Fig. 11, where three...Ch. 3.4 - Consider the feasible set in Fig. 11, where three...Ch. 3.4 - Consider the feasible set in Fig. 11, where three...Ch. 3.4 - Prob. 6ECh. 3.4 - Prob. 7ECh. 3.4 - Consider the feasible set in Fig. 12, where three...Ch. 3.4 - Consider the feasible set in Fig. 12, where three...Ch. 3.4 - Consider the feasible set in Fig. 12, where three...Ch. 3.4 - Consider the feasible set in Fig. 13. For what...Ch. 3.4 - Prob. 12ECh. 3.4 - Nutrition-Animal Mr. Smith decides to feed his pet...Ch. 3.4 - Oil Production An oil company owns two refineries....Ch. 3.4 - Investment Planning Mr. Jones has $9000 to invest...Ch. 3.4 - Shipping-Product Mix A produce dealer in Florida...Ch. 3.4 - 17. Transportation—Shipping A foreign-car...Ch. 3.4 - Transportation-Shipping Consider the foreign-car...Ch. 3.4 - Manufacturing-Production Planning An oil refinery...Ch. 3.4 - 20. Manufacturing—Production Planning Suppose that...Ch. 3.4 - 21. Shipping—Resource Allocation A shipping...Ch. 3.4 - Shipping-Resource Allocation Suppose that the...Ch. 3.4 - 23. Transportation—Shipping A major coffee...Ch. 3.4 - Transportation-Shipping Consider the coffee...Ch. 3.4 - 25. Packaging—Product Mix A pet store sells three...Ch. 3.4 - Prob. 26ECh. 3.4 - 27. Refer to Fig. 6. As the lines of constant...Ch. 3.4 - Figure 16 shows the feasible set for the nutrition...Ch. 3.4 - Consider the feasible set in Fig. 17(a). In...Ch. 3.4 - Consider the feasible set in Fig. 17(a). In...Ch. 3.4 - Consider the feasible set in Fig. 17(a). In...Ch. 3.4 - Consider the feasible set in Fig. 17(a). In...Ch. 3.4 - Consider the feasible set in Fig. 17(a). In...Ch. 3.4 - Consider the feasible set in Fig. 17(a). In...Ch. 3.4 - Consider the feasible set in Fig. 17(a). In...Ch. 3.4 - Consider the feasible set in Fig. 17(a). In...Ch. 3.4 - Prob. 37ECh. 3 - State the inequality properties for addition,...Ch. 3 - What are the general forms of a linear inequality...Ch. 3 - Prob. 3FCCECh. 3 - 4. What is meant by the feasible set of a system...Ch. 3 - Prob. 5FCCECh. 3 - Prob. 6FCCECh. 3 - Prob. 7FCCECh. 3 - Prob. 8FCCECh. 3 - 9. Give a procedure for solving a linear...Ch. 3 - Prob. 1RECh. 3 - 2. Graph the linear inequality.
Ch. 3 - 3. Write the inequality whose graph is the...Ch. 3 - 4. Travel—Resource Allocation Terrapin Airlines...Ch. 3 - Nutrition-People A nutritionist is designing a new...Ch. 3 - Prob. 6RECh. 3 - Packaging-Product Mix A confectioner makes two...Ch. 3 - Prob. 8RECh. 3 - Packaging-Resource Allocation A computer company...Ch. 3 - Transportation-Shipping An appliance company has...Ch. 3 - Prob. 11RECh. 3 - Prob. 12RECh. 3 - Prob. 13RECh. 3 - Prob. 14RECh. 3 - Prob. 15RECh. 3 - Prob. 16RECh. 3 - When mathematicians are presented with a linear...Ch. 3 - When mathematicians are presented with a linear...Ch. 3 - When mathematicians are presented with a linear...Ch. 3 - When mathematicians are presented with a linear...Ch. 3 - When mathematicians are presented with a linear...Ch. 3 - When mathematicians are presented with a linear...
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