Anita paid a total of $57. 50 for a blazer. The price of the blazer was $52. 85. What was the sales tax rate? A. 4. 56% B. 8. 08% C. 8. 79%.

r = 8.80%

Step-by-step explanation:

To find the tax rate, first determine how much the tax was

57.50 - 52.85 = 4.65

Then take the original price times the tax rate = tax

52.85 * r = 4.65

Divide each side by 52.85

r = 4.65/52.85

r =.087984863

Change to decimal form

r = 8.7984863

Rounding to the nearest hundredth

r = 8.80%

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;