Business Calculus Online 1.3-1.7
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Name: Kevin Yang 1.7
#1 Points possible: 1. Total attempts: 0
A population numbers 17,000 organisms initially and grows by 19.1% each year.
Suppose represents population, and the number of years of growth. An exponential model for the
population can be written in the form where
=
#2 Points possible: 1. Total attempts: 0
The fox population in a certain region has an annual growth rate of 6 percent per year. It is estimated
that the population in the year 2000 was 6300.
(a) Find a function that models the population years after 2000 ( for 2000).
Your answer is
(b) Use the function from part (a) to estimate the fox population in the year 2008.
Your answer is (the answer should be an integer)
#3 Points possible: 1. Total attempts: 0
A vehicle purchased for $22,400 depreciates at a constant rate of 7%. Determine the approximate value
of the vehicle years after purchase. Round to the nearest whole dollar.
$
#4 Points possible: 1. Total attempts: 0
A bank features a savings account that has an annual percentage rate of % with interest
compounded quarterly. Stephen deposits $10,500 into the account.
The account balance can be modeled by the exponential formula , where is
account value after years , is the principal (starting amount), is the annual percentage rate, is the
number of times each year that the interest is compounded.
(A) What values should be used for , r, and ?
, ,
(B) How much money will Stephen have in the account in years?
Answer = $ .
Round answer to the nearest penny.
(C) What is the annual percentage yield (APY) for the savings account? (The APY is the actual or
effective annual percentage rate which includes all compounding in the year).
%.
Round answer to 3 decimal places.
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a. black
b. orange
c. red
d. green
e. blue
#5 Points possible: 1. Total attempts: 0
A population of bacteria is growing according to the equation . Estimate when the population will exceed 463.
t=
Give your answer accurate to one decimal place.
#6 Points possible: 1. Total attempts: 0
Match each equation with a graph above
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#7 Points possible: 1. Total attempts: 0
R
K
O
G
B
If all the graphs above have equations with form ,
Which graph has the largest value for b?
Which graph has the smallest value for b?
Which graph has the largest value for a?