You can count by powers of 10 to find the power of ten you're looking for. (Ex: I'm looking for 100. So I count by powers of 10. 10,100,1000,10000) and I found it
LENGTH=2/7
WIDTH= 3/7
Perimeter is 2l+2w
Length= 2/7+ 2/7 is 4/7
Width= 3/7 + 3/7 is 6/7
Answer is 4/7+ 6/7 is 10/7
Answer= 10/7 = 1 3/7
The answer is D. Every half an hour it goes up by 30, so every hour is 60
I think the answer is b probably