Question

4. Suppose an investment of $s1.800 doubles in value every 7 years. How much is the investment worth after 42 years?

Answer 1

we are given

initial amount =1800

so,

P=1800

doubles in value every 7 years

so, we can find function

$A=P(2)^{\frac{t}{7} }$

now, we can plug P=1800

$A=1800(2)^{\frac{t}{7} }$

now, we can plug t=42

$A=1800(2)^{\frac{42}{7} }$

$A=115200$.............Answer