Question

Express your answer in scientific notation.

2.8\cdot10^{-3} -0.00065 =2.8⋅10
−3
−0.00065=2, point, 8, dot, 10, start superscript, minus, 3, end superscript, minus, 0, point, 00065, equals

Answer 1

2.15

×

10

−

3

Explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the

10

. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

Answer 2

The answer is 2.15 * 10^-3

Explanation:

I got this answer from Khan Academy.

Hope this helps! :)