Question

What is the difference of (8.5 × 10^15) – (5.0 × 10^14) in correct scientific notation?

A. 3.5 × 10^1

B. –5.15 × 10^14

C. 8.0 × 10^15

D. 3.5 × 10^15

E. 9.0 × 10^14

Answer 1

Is A the correct answer?

Answer 2

I subtracted 8.5 - 5.0 and got 3.5

Answer 3

and then 10^15 - 10^14 = 10^1

Answer 4

you can write this as 8.5 - 0.5
because the exponent of the 5.0 is 1 lower than the 8.5

when you do \(1.5*10^3 - 5.0*10^2\), it's the same as 1500 = 500. So the answer will be \(1.0*10^3\)

Do you have an idea what might be the answer?

Answer 5

8.0 x 10^ 15?

Answer 6

yes :)

Answer 7

Thank you so much!