Question

Please help!!! thank you so much in advance

Answer 1

#3: you can write 8% as

8/100

0.08

0.8/10

#4: both statemenets are correct! there are 12 total students! not sure the problem.

#5: as you know from the last question there are 12 total children in the class, if the ratio of BOYS TO GIRLS is 5 to 7 that means that:

5/12 students in the class are boys

7/12 students in the class are girls

Explanation:

Answer 2

3.

Three different interpretations of an 8% sales tax? Odd question.

8%, 8 percent, literally means "8 per 100". For each $100 item you purchase you pay an additional $8 in tax.

8% = 0.08, the factor applied to the price to determine the tax.

8%=8/100, you pay 8 cents in tax for every 100 cents in sales

4.

Just because the ratio is 5:7 doesn't mean the total is 5+7=12. Non zero factors don't change a ratio, e.g. 5:7=50:70.

5.

b/g=5/7

The fraction of boys is b/(b+g) which if you've done these a few times you can immediately write down as 5/12. Let's solve it like its our first time,

`g = \frac 7 5 b`

`(b)/(b+g) = (b)/(b + \frac 7 5 b) = (1)/(1 + \frac 7 5) = (1)/((12)/(5)) = (5)/(12)`

Similarly the fraction of girls is 7/12.