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

your answer is b. 1.75*10^-15

:)

Answer 2

(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