This should be correct I am sorry if it is not.
<span>-0.01511422733</span>
Multiply what’s on the outside to the inside, the variable is always a lower case letter such as x,
38. 8•4 =32cm^2
39. 8+8+5+5=26 cm^2
40. Pi•r*2 so = 28.27in^3
41. 15/2=7.5 so pi•7.5^2 so area is 176.71m^3