The full answer would be 83.454 but you can just say 83 pounds. Both are right
I think the answer would be 99
you multiply 9 and 11 and get 99
First you need to divide 125 / 25 which is 5 then you do subtraction 21 x 5 which is 105, then you subtract again 125 - 105 which is 20, 20 light bulbs will be broken. Or you could have just multiplied 5 by 4 which is the amount of light bulbs that were broken which is a lot easier...

x=8
16-8=8

Use a calculator to find the square root of 8.
Answer:
The answer is 1.3, 1 3/10