If I did my math correctly the answer is 2000
Power rule. d/dx(x^n) = nx^(n-1)
We can pull the 5 out and multiply it back in later.
d/dx(x^2) = 2x
2(10) = 20*5 = 100
If you would like to know 55 percent of what number is 495, you can calculate this using the following steps:
55% of what number = 495
55% * x = 495
55/100 * x = 495
x = 495 * 100/55
x = 900
The number you are looking for is 900.