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)

Step-by-step 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

multiplication is multiplication.   it might feel harder depending on what level of math you are in, but generally it will be the same old stuff, while implementing some new concepts and methods of solving work.

they r 125, and 216

so the sequence goes 1,8,27,64,125,216