To find the area of a semicircle you would use the formula A=pie * r ^ 2 If you fill in 40 for r you would get 5026.5482
Answer:
Hi! The answer to your question is B) He can walk 12 miles in 1 minute.
To find Unit rate divide the biggest number by the smallest; Example: 
Step-by-step explanation:
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3a4
that should be your answer
Since grades are out of 100, you can just subtract 75 from 90 which is 15. the percent of increase in the student's grade is 15%
Answer:
7/15
Step-by-step explanation:
5/21=0.238
7/15=0.467
(rounded answers)