Use the formula for the area or circumference of a circle to solve the problem. Where applicable, express answers in terms of ?.The circumference of a circle is 32? meters. Find the circle's diameter.
A. 16 m
B. 16? m
C. 32 m
D. ? m
Answer: C
Mathematics
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Solve the problem.If an item has an original price of $467 and the discount rate is 25%, find the discount.
A. $116.75 B. $112.08 C. $121.42 D. $58.38
Mathematics
Solve.A baker can decorate the day's cookie supply four times as fast as his new assistant. If they decorate all the cookies working together in 24 minutes, how long would it take for each of them to decorate the cookies working individually?
A. baker: 120 min
assistant: 480 min
B. baker: 120 min
assistant: 30 min
C. baker: 7
min
assistant: 29 min
D. baker: 30 min
assistant: 120 min
Mathematics
Decide whether or not the matrices are inverses of each other.
and 
A. Yes B. No
Mathematics
Use the horizontal line test to determine whether the function is one-to-one.
A. Yes B. No
Mathematics