Homework Help: math

Posted by Allen on Thursday, April 9, 2009 at 2:49am.

Business and finance. Avirus scanning program is checking every file for viruses.
It has completed checking 40% of the files in 300 seconds. How long should it take
to check all the files?

math - jen, Thursday, April 9, 2009 at 3:01am
if you add another 40%, you will be done with 80% in 600 seconds. 20% is left. .20 times 600=120 sec

600+120=720 sec
math - Reiny, Thursday, April 9, 2009 at 8:03am
Jen is wrong.

A simple test of taking 40% of her answer of 720, which would be 288, would have indicated it was not right

let the total time be x seconds
so .4x = 300
x = 300/.4 = 750 seconds

(check: 40% of 750 = 300)

Answer this Question

Related Questions

Math - Avirus scanning program is checking every file for viruses. It has ...
math - A virus scanning program is checking every file for viruses. It has ...
Caplan - A virus-scanning program is checking every file for viruses. It has ...
Math - A virus scanning program is checking every file for viruses. It has ...
Math - Can you tell me if I got these wrong or right? 1. Ms. Jordan has been ...
math - will someone check my work please?A virus scanning program is checking ...
math - Please help A school had 900 students at the start of a school year. If ...
Computer - After writing the program of Exercise 17.7, write a simple program to...
Computer Viruses - A virus that infects an application program is known as a ...
medical billing - the file clerk discovered a medical record placed incorrectly ...

For Further Reading

First Name:
School Subject:
Answer: