Select the correct answer. What is the area of `∆STR`?

A.

30 square feet

B.

34.5 square feet

C.

57.5 square feet

D.

60 square feet

2,160 π

step-by-step explanation:

answer is c

step-by-step explanation:

81/12=324/x

x=48

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;