Find the simplified form of the expression. Give your answer in scientific notation. (8 x 10^4)(9 10^-8)
a.7.2×10^-5
b.7.2×10^-3
c.72×10^-4
d.7.2×10^-31​

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

The volume of a cube-shaped shipping container is 13,824 cubic inches. find the edge length of the shipping container.

Secant be and cf intersect at point d inside a what is the measure of cde