Question

What is the product in scientific notation? (2.5x10^-10)(7x10^-6)
A.1.75x10^16
B.1.75x10^15
C. 1.75x10^-16
D.1.75x10^-17

Answer 1

This can be done in steps. First multiply the two terms that are powers of ten:
\[\large 10^{-10}\times10^{-6}=?\]
Hint: When multiplying powers of the same base, add the powers.

Answer 2

I got -16

Answer 3

Actually it should be 10^(-16).

Answer 4

Next multiply:
\[\large 2.5\times7=?\]

Answer 5

(2.5 x 10^-10) * (7 x 10^-6)
Actually the answer isn't 10^-16
don't forget to multiply 2.5 * 7

Answer 6

@wolf1728 Did you notice we are doing the calculation in steps?

Answer 7

Sorry kropot

Answer 8

np

Answer 9

\[2.5\times7=17.5=1.75\times10^{1}\]
Now we can do the final multiplication:
\[\large 1.75\times10^{1}\times10^{-16}=?\]