Question

Evaluate each expression. Express your answer in scientific notation.

(1.5 x 10^2)(5x10^10)
4.8 x 10^-8 / 3x10^-3
(5 x 10^8)(4x10^3)
(7.2x10^3)÷(1.2 x 10^5)

Answer 1

Explanation:

To simplify

(1.5×10^2)(5×10^10)

(1.5×5)×10^2×10^10

7.5×10^12

To simplify 4.8×10^-8÷3×10^-3

(4.8÷3)×10^-8+3

1.6×10^-5

To simplify

5×10^8×4×10^3

(5×4)×10^8×10^3

20×10^11

2.0×10^1×10^11

2.0×10^12

To find

7.2×10^3÷1.2×10^5

(7.2÷1.2)×10^3-5

6×10^-2