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ahrayia [7]
3 years ago
10

What is (7.2×10^2)(6×10^-7) in scientific notation?

Mathematics
1 answer:
Norma-Jean [14]3 years ago
7 0
Multiply the numbers on the left side of the multiplication sign. 

7.2 * 6 = 43.2

Combine the exponents attached to the 10s.

2 + (- 7) 
2 - 7
- 5

Your scientific notation should be 43.2 x 10⁻⁵.

As a way to check your answer:

7.2 x 10² = 720 (move the decimal to the right twice)

6 x 10⁻⁷ = 0.0000006 (move the decimal to the left 7 times because it's a negative exponent)

Multiply the two together on a calculator, you get 0.000432. If you move the decimal 5 times to the left on 43.2 (again, because it's a negative exponent), you get 0.000432. The answers match. 


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