Solve each problem. When needed, use 3 65 days per year and 3 0 days per month. Newspaper Circulation As more and more people turn to Internet and 24–hour cable network news, newspaper circulation has declined. The accompanying table gives the total number of daily papers sold in the United States ( www.naa.org ). a. Use the exponential regression feature of a graphing calculator to find an equation of the form y = ab x that fits the data, where x is the years since 1990. b. Judging from the graph of the data and the curve, does the exponential model look like a good model for these data? c. Use the equation to estimate the daily newspaper circulation in 2015.
Solve each problem. When needed, use 3 65 days per year and 3 0 days per month. Newspaper Circulation As more and more people turn to Internet and 24–hour cable network news, newspaper circulation has declined. The accompanying table gives the total number of daily papers sold in the United States ( www.naa.org ). a. Use the exponential regression feature of a graphing calculator to find an equation of the form y = ab x that fits the data, where x is the years since 1990. b. Judging from the graph of the data and the curve, does the exponential model look like a good model for these data? c. Use the equation to estimate the daily newspaper circulation in 2015.
Solution Summary: The author explains how the equation of the form y=abx can be obtained by the exponential regression capabilities of TI-83 graphing calculator.
Solve each problem. When needed, use 365 days per year and 30 days per month.
Newspaper Circulation As more and more people turn to Internet and 24–hour cable network news, newspaper circulation has declined. The accompanying table gives the total number of daily papers sold in the United States (www.naa.org).
a. Use the exponential regression feature of a graphing calculator to find an equation of the form y = abx that fits the data, where x is the years since 1990.
b. Judging from the graph of the data and the curve, does the exponential model look like a good model for these data?
c. Use the equation to estimate the daily newspaper circulation in 2015.
Directions: Use the equation A = Pet to answer each question and be sure to show all your work.
1. If $5,000 is deposited in an account that receives 6.1% interest compounded continuously, how much money is in the
account after 6 years?
2. After how many years will an account have $12,000 if $6,000 is deposited, and the account receives 3.8% interest
compounded continuously?
3. Abigail wants to save $15,000 to buy a car in 7 years. If she deposits $10,000 into an account that receives 5.7% interest
compounded continuously, will she have enough money in 7 years?
4. Daniel deposits $8,000 into a continuously compounding interest account. After 18 years, there is $13,006.40 in the account.
What was the interest rate?
5. An account has $26,000 after 15 years. The account received 2.3% interest compounded continuously. How much was
deposited initially?
TRIANGLES
INDEPENDENT PRACTICE
ription Criangle write and cow
Using each picture or description of triangle write and solve an equation in ordering the
number of degrees in each angle
TRIANGLE
EQUATION & WORK
ANGLE MEASURES
A
B
-(7x-2)°
(4x)
(3x)°
(5x − 10)
C
(5x – 2)
(18x)
E
3.
G
4.
H
(16x)°
LL
2A=
2B=
ZE=
Answer ASAP and every part, please. Structures.
Chapter 4 Solutions
College Algebra, Books a la Carte Edition, plus NEW MyLab Math- Access Card Package (6th Edition)
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