Unit 3 SCA Corrections

Marie purchased a $49.00 gift for a baby shower. She uses a coupon that offers 20% off. How much will Marie spend on the gift after the coupon?

Answer explanation

Marie will spend $39.20 on the gift after applying the 20% off coupon.

A recipe for apple cider calls for 4 cups of apple juice and 3 cups of water. Which equation can be used to find x, the percent of apple juice in the recipe?

• 4/3 = X/100

• 3/4 = X/100

• 7/3 = 100/X

• 7/4 = 100/X

Answer explanation

The equation 4/7 = 3/X can be used to find x, the percent of apple juice in the recipe. This equation represents the ratio of apple juice to the total mixture.

A box of cereal weighs 14 ounces and costs $2.66. What is the price per ounce of the cereal?

• $0.14

• $0.19

• $0.21

• $0.24

Answer explanation

The price per ounce of the cereal is $0.19. To find this, divide the cost of the cereal ($2.66) by its weight (14 ounces). The correct choice is $0.19.

Romeo paid $380.75 in car repairs. The sales tax rate is 7.5%. Which of the following is a reasonable estimate for the total Romeo paid to repair his car?

• $28.50

• $410.00

• $352.50

• $442.00

Answer explanation

The correct choice is $410.00, which is a reasonable estimate for the total Romeo paid to repair his car after adding the 7.5% sales tax.

A local flower shop sells a dozen roses for $12.85. Based on this information, which of the following could be true?

• $38.55 for four dozen roses

• $64.25 for five dozen roses

• $25.70 for 18 roses

• $32.13 for two dozen roses

Answer explanation

The correct choices are $64.25 for five dozen roses and $32.13 for two dozen roses. These prices are possible based on the given information.

A piece of fabric measures 152.4 centimeters in length. One inch is equal to 2.54 centimeters. What is the length of the fabric in inches?

Answer explanation

To convert centimeters to inches, divide the length in centimeters by 2.54. Therefore, the length of the fabric in inches is 60 inches, which is the correct choice.

Javier worked the following hours in the month of October. What was the percent increase from week 2 to week 4?

Answer explanation

The percent increase from week 2 to week 4 is 32%. This is the correct choice.

Airfare from Atlanta, GA to Nashville, TN changed from $250 per ticket to $180 per ticket. By what percentage did the cost of the airfare c​hange?​ (a)   ​

• An increase of 28%

• An increase of 39%

• A decrease of 28%

• A decrease of 39%

Answer explanation

The cost of the airfare decreased by 28%. This is the correct choice as stated in the question.

Which set of ratios below is NOT equivalent to 3:4 ? ​ (a)  

• 6 to 9 ,  9/12

• 9 to 12 , 15/20

• 24/32 , 24 to 32

• 30/40, 18:24

Answer explanation

The set of ratios 6 to 9 and 9/12 is NOT equivalent to 3:4 because it simplifies to 2:3, which is different from 3:4.

The Hoskins family spends $600 per month on groceries for their family. If this is 15% of their monthly budget, then what is their monthly budget?