# Hey guys so I've been having some trouble with this question How

#### oldspice1212

Hey guys so I've been having some trouble with this question...

How many nanoseconds does it take for a computer to perform one calculation if it performs 6.9 × 10^7 calculations per second?

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#### Integral

Staff Emeritus
Gold Member
Re: Nanoseconds

How many nano seconds in a second?

Re: Nanoseconds

10^9 I believe

#### oldspice1212

Re: Nanoseconds

So is the answer 69 nano seconds?

#### Andre

Re: Nanoseconds

No. Just shift the decimals until you have something with .... x 109 sec since you can substitute that with nano seconds

#### nasu

Re: Nanoseconds

So is the answer 69 nano seconds?
The conversion to nanoseconds is the second step for the question. First you have to find the time for one operation, in seconds or any convenient unit. Then you can convert in nanoseconds.
The given value is not the time for one operation but the number of operation per second.

#### oldspice1212

Re: Nanoseconds

Alright so I got 14 nano seconds, I did 1 calculation/ seconds * seconds/ calculations per second which was 14 nano seconds :P

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