Question

What is the product in scientific notation?


(2.5*10^-10)(7*10 ^-6)


A. 1.75*10^16
B. 1.75*10^-15
C. 1.75*10^-16
D. 1.75*10^-17

Answer 1

(2.5 × $10^{-10}$ ) × (7 × $10^{-6}$ )

First, simplify brackets. / Your problem should look like: 2.5 × $10^{-10}$ × 7 × $10^{-6}$
Second, simplify. / Your problem should look like: 17.5 × $10^{-10}$ × $10^{-6}$
Third, simplify exponent. / Your problem should look like: 17.5 × $10^{-15}$

Answer: B

Answer 2

your answer is b. 1.75*10^-15

:)