Asked by heather

(6.0 x 10^5) x (3.0 x 10^4)=

A. 18 x 10^20
B. 18 x 10^9
C. 1.8 x 10^20
D. 1.8 x 10^10

2. (5 x 10^-2) divided by
(2 x 10^3) =
A. 2.5 x 10^-5
B. 2.5 x 10^-1
C. 25 x 10^1
D. 25 x 10^2

3. (2.56 x 10^6) times
(3.56 x 10^2)=
A. 9.1136 x 10^12
B. 91.138 x 10^8
C. 9.1136 x 10^8
D. 91.136 x 10^12

4. In a reacent year, the population of California was about 2.52 x 10^7 people. Its land area is about 4.05 x 10^5 km^2. What is the average number of people per square kilometer?

A. 0.62 x 10^5
B. 6.2 x 10^1
C. 0.62 x 10^14
D. 6.2 x 10^9

Please help!!!
Answered by PsyDAG
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown.

When multiplying/dividing numbers with exponents, the exponents are added/subtracted respectively.
Answered by doogal
7 years and nothing
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