Can you tell me if I got these wrong or right?
1. Ms. Jordan has been given a loan of $2,500 for 1 year. If
the interest charged is $275, what is the interest rate on the loan?
= 11%
2. A school had 900 students at the start of a school year. If there is
an enrollment increase of 7% by the beginning of the next year, what is the new
enrollment?
= 963 students
3.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?
= 750 seconds or 12 minutes 30 seconds.
all correct.
well i forget about fractions,so can you help me please.
Here's an excellent website that includes a really good section on fractions.
http://www.aaastudy.com/fra.htm
Choose what you need to know about fractions (or go through all of them) and then post specific questions using the Post a New Question link at the top of the page.
To determine if the answers are right or wrong, let's go through the process of solving each problem.
1. To find the interest rate on a loan, divide the interest charged by the principal amount and then multiply by 100 to convert it to a percentage.
In this case:
Interest charged = $275
Principal amount = $2500
Interest rate = (Interest charged / Principal amount) * 100
= (275 / 2500) * 100
= 11%
The answer you provided, 11%, is correct.
2. To calculate the new enrollment after a percentage increase, we need to multiply the current number by 1 plus the percentage increase.
In this case:
Current enrollment = 900
Percentage increase = 7%
New enrollment = Current enrollment * (1 + Percentage increase/100)
= 900 * (1 + 7/100)
= 900 * (1 + 0.07)
= 900 * 1.07
≈ 963
The answer you provided, 963 students, is correct.
3. To find out how long it will take to check all the files, we need to determine the time required for checking 1% of the files and then multiply that by 100.
In this case:
Percentage completed = 40%
Time taken = 300 seconds
Time required for 1% = Time taken / Percentage completed
= 300 / 40
= 7.5 seconds
Time required to check all files = Time required for 1% * 100
= 7.5 * 100
= 750 seconds
Alternatively, you can convert 750 seconds to minutes by dividing by 60:
750 seconds / 60 = 12.5 minutes
The answer you provided, 750 seconds (or 12 minutes 30 seconds), is correct.