Answer:
Assuming that all three sides are 9 inches then the answer should 729.
Step-by-step explanation:
Just multiply 9*9*9. The formula to get volume is (length)*(width)*(height).
1.) 40, 2.) 8, 3.) 18, 4.) 15, 8.) 12, 9.) 30, 10.) 72, 11.) 36
You just add the values for volunteers that worked 16-20 hours and 21-25 hours which would be 50 + 10 = 60. So the total number of volunteers that workers more than 15 hours is 60.
Multiply 3x by -6, it gives you -18 so I'm going to say D
