Answer:
79.49
Step-by-step explanation:
A=πr²
r=½ of d= 5.03
A= π•5.03²= 79.49
Answer:
10
Step-by-step explanation:
I can't really explain this well but, when you double 4 you get 8 (which is how many she did), so since you doubled 4 you also have to double 1 which would be 2. Then add 8 and 2 and you get 10
D is also correct. if you need an explanation let me know
Answer:
80%
Step-by-step explanation:
Percent increase is calculated as
× 100%
Increase = $27 - $15 = $12 , then
percent increase = × 100% = 0.8 × 100% = 80%
Well what is 30x3 (because that is how you would find what is one third of unknown) then you find the answer witch is 90$