Step-by-step explanation:
add the radii to get the diameter then multipy by pi
10 (3.14) =31.4
Just divide 21/1/3 and that number multiplied by 4
Cosine = adjacent / hypotenuse
cos (49)= x/27
27 * cos(49) = x
27 * 0.656 = x
x = 17.7
D 61.28 because you divide 64.50 by 0.05 then which is 3.23 then 64.50 - 3.23
The answer is -3, i had a test with the same question
