5.80x10(9)s + 3.20x10(8)s

In order to add or subtract numbers expressed in scientific notation, it is important that the powers of 10 in the numbers should have the same index or else you cannot readily add or ubtract these numbers. We do as follows: a. 5.80 x 10^9 s +3.20 x 10^8 s We need to adjust one of the numbers since they do not have the same indices. We move one place to the left of the second number making it .320 x 10^9 s. Then, we can add the numbers now:

5.80 x 10^9 s +.320 x 10^9 s = 6.12 x 10^9 s

Explanation:

5.80 x 10^9 s +.320 x 10^9 s = 6.12 x 10^9 s

We can subtract the numbers directly since they have the same indices.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

false.

explanation:

this statement is false. after falling for 5 seconds, its speed will not be 100 m/s.