Last week Trent made 80 on his quiz. This week he made 90. What is the percent of increase in his score?
10%
12.5%
11%
15%
The percent of increase in his score can be found by calculating the difference between his scores and dividing it by the initial score, then multiplying by 100.
The difference in his scores is 90 - 80 = 10.
The initial score is 80.
The percent of increase = (10/80) * 100 = 12.5%
Therefore, the correct answer is 12.5%.
Sandra bought a new coat for $49.99 and 3 skirts for $24.99 each. If the sales tax rate is 7%, to the nearest cent what is the amount of sales tax Sandra will owe on the purchase?
$151.90
$11.36
$7.52
$8.75
To calculate the amount of sales tax, first find the total cost of the skirts:
3 skirts * $24.99 per skirt = $74.97
Then find the total cost of the purchase by adding the cost of the coat and the skirts:
$49.99 (coat) + $74.97 (skirts) = $124.96
Now calculate the amount of sales tax by multiplying the total cost by the sales tax rate:
$124.96 * 7% = $8.75
Therefore, the amount of sales tax Sandra will owe on the purchase is $8.75.
To calculate the percent increase in Trent's score, you can use the following formula:
Percent increase = (New score - Old score) / Old score * 100
Using this formula, we can calculate the percent increase in Trent's score:
Percent increase = (90 - 80) / 80 * 100
Percent increase = 10 / 80 * 100
Percent increase ≈ 12.5%
So, the correct answer is: 12.5%
To calculate the percent increase in Trent's score, you will need to find the difference between his scores and divide it by the original score.
First, find the difference:
90 - 80 = 10
Next, divide the difference by the original score:
10 / 80 = 0.125
To express this as a percentage, multiply by 100:
0.125 * 100 = 12.5
Therefore, the percent increase in Trent's score is 12.5%.
The correct option is: 12.5%