Question

An investment is currently worth 2.125×104 dollars . Ten years ago, the investment was worth ​ 1.25×103 ​ dollars. How many times greater is the value of the investment today than the value of the investment ten years ago? A 0.17 B 1.7 C 17 D 170

Answer 1

Answer: C. 17

Explanation:

Given : An investment is currently worth
`2.125*10^4` dollars . Ten years ago, the investment was worth
`1.25*10^3` dollars.

Then, the number of times the value of the investment today is greater than the value of the investment ten years ago is given by :-

`\frac{\text{Current investment}}{\text{\text{Yen years ago investment}}}\\\\=(2.125*10^4)/(1.25*10^3)\\\\=(2.125)/(1.25)*10^(4-3)\ \ [\because a^m* a^n=a^(m+n)]\\\\=1.7*10=17`

Hence, the value of the investment today is 17 times greater than the value of the investment ten years ago .