A computer performs a calculation in 2.5 x 10^-5 seconds to solve a math problem.
How long does the computer need to calculate the solutions to 3 x 10^6 math problems?
SOLUTION
The time taken to one question = 2.5 x 10^-5 seconds
For 3 x 10^6 math problems = 2.5 x 10^-5 X 3 x 10^6
= 7. 5 X 10^-5 X 10^6
= 7. 5 X 10 ^ -5 + 6
= 7. 5 X 10^1 seconds