(d) Assuming that no payments are made, use your formula from part (b) to determine how long it would take for your account balance to double. (Round your answer to two decimal places.) X years

College Algebra
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ISBN:9781337282291
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Chapter5: Exponential And Logarithmic Functions
Section5.5: Exponential And Logarithmic Models
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Answer part (d)

Suppose that you borrow $10,000 at 2% APR and that interest is compounded continuously. The equation of change for your account balance B = B(t) is
dB
= 0.02B.
dt
Here t is the number of years since the account was opened, and B is measured in dollars.
(a) Explain why B is an exponential function.
O The equation of change is
df
= erx where r is a constant.
dx
df
= rex wherer is a constant.
dx
O The equation of change is
df
O The equation of change is
dx
1
where r is a constant.
df
= rf wherer is a constant.
dx
O The equation of change is
df
= r where r is a constant.
dx
The equation of change is
(b) Find a formula for B using the alternative form for exponential functions.
B = 10000e.02t
(c) Find a formula for B using the standard form for exponential functions. (Round the growth factor to three decimal places.)
B = 10000 · 1.02'
(d) Assuming that no payments are made, use your formula from part (b) to determine how long it would take for your account balance to double. (Round your answer to two decimal
places.)
years
Transcribed Image Text:Suppose that you borrow $10,000 at 2% APR and that interest is compounded continuously. The equation of change for your account balance B = B(t) is dB = 0.02B. dt Here t is the number of years since the account was opened, and B is measured in dollars. (a) Explain why B is an exponential function. O The equation of change is df = erx where r is a constant. dx df = rex wherer is a constant. dx O The equation of change is df O The equation of change is dx 1 where r is a constant. df = rf wherer is a constant. dx O The equation of change is df = r where r is a constant. dx The equation of change is (b) Find a formula for B using the alternative form for exponential functions. B = 10000e.02t (c) Find a formula for B using the standard form for exponential functions. (Round the growth factor to three decimal places.) B = 10000 · 1.02' (d) Assuming that no payments are made, use your formula from part (b) to determine how long it would take for your account balance to double. (Round your answer to two decimal places.) years
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