A circular pond has a circumference of about C feet. The diameter of the pond is 7 feet. Which expression best represents the value of pi? :)

A. C/14

B. 7/C

C. 14/C

D. C/7

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

If square root x = -7, then x= -49 true or false

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}