Answer:
3.16
Step-by-stepp explanation:
The volume of a cylinder is given by the expression:
V = πr²h ----------*
314cm³ = 22/7 X r² X 10cm
314cm³ = 220/7 X r²
r² = 314 X 7 ÷ 220
r² = 2198 ÷ 220
r² = 9.99
r =√9.99
r = 3.16
Hence the radius of the cylinder is 3.16
90 + 12/5 x 60=90 + 144 +100= 334
so 334 would be your answer
Check the picture below.
Make sure your calculator is in Degree mode.
30
(-3)*(-2)=6
6*5=30
Double negatives makes a positive