78. Compound interest. If $1000 is invested at interest rate r, compounded annually, in 3 yr it will grow to an amount A given by (see Section R.1) A = $1000(1 + r)3. a) Find the rate of change, dA/dr. b) Interpret the meaning of dA/dr.

Algebra and Trigonometry (MindTap Course List)
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78. Compound interest. If $1000 is invested at interest rate r,
compounded annually, in 3 yr it will grow to an amount
A given by (see Section R.1)
A = $1000(1 + r)3.
a) Find the rate of change, dA/dr.
b) Interpret the meaning of dA/dr.
Transcribed Image Text:78. Compound interest. If $1000 is invested at interest rate r, compounded annually, in 3 yr it will grow to an amount A given by (see Section R.1) A = $1000(1 + r)3. a) Find the rate of change, dA/dr. b) Interpret the meaning of dA/dr.
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