Combine integer index laws and compare quantities in scientific notation

Answer: 2

1. A power of a power multiplies exponents, and division subtracts them.
2. x=3×2−4=2.

Answer: 10

1. Divide the first count by 2 hours
2. divide by the second rate.
3. The common power leaves 10×22​=10.

Answer: 4

1. A power of a power multiplies exponents, and division subtracts them.
2. x=3×2−2=4.