0.4 is 10 times as much as 0.04
this is because 0.04 times 10 is 0.4
0.003 is 1/10 of 0.03
0.003 times 10 is 0.03
You would use the tangent first, because the opposite of 40 would be x and the adjacent would be 30ft
Step-by-step explanation:
Circumference
C = 3.14x3
C = 9.42cm
Area
A = 3.14xr²
A = 3.14x25
A = 78.5ft
Remark
You must use the sin law to find this.

Multiply through by 12
12 *
*12

0.5269 = sin(x)
Now you have to use the inverse of the sine function.
Use your calculator for that
2nd F
sin-1
(0.5269)
= 31.79 degrees. <<<<<< Answer.
There sometimes is a second answer. I don't think there is in this case.