a pc can do a computation in 5 * 10 ^ -7? how many computations can it do in one second?

Question

how many computations can it do in one second? and
How long would it take the computer to do a billion computations

plz show some work

Answer 1

I'm assuming 5*10^-7 is in seconds. What you're given is seconds / computation. What you want instead is computations / second (also called the frequency), which is just the reciprocal.

1/(5*10^-7) = 2,000,000 computations / second