Answer:
Alexia completed 8 math problems and 9 science problems
Step-by-step explanation:
3 minutes per math problem (8*3) is 24
4 minutes per science problem (9*4) is 36
36+24=60 minutes
The answer to your question is 2
Answer:
2*10 ^6 shoes in 10 years
Step-by-step explanation:
1.81 × 10^4 pairs of shoes each month
1.2 × 10^2 months in 10 years
Multiply these together to determine the number of shoes in 10 years
1.81 × 10^4 * 1.2 × 10^2
We want to estimate so 1.81 is approximately 2 and 1.2 is approximately 1
2 × 10^4 * 1 × 10^2
Multiply the numbers
2*1 = 2
Add the exponent
10 ^ ( 4+2)
10 ^6
Put this back together
2*10 ^6
Note that
n^m*n^r=n^(m+r)
2^5*2^x=2^(5+x)
the answer is D
