Title: M1.1 Ratio & Proportions Quiz
Course: Technical Math for Industry > Section: Module 1.1 Ratio Proportion & Percents

Q: Santos flipped a coin 300 times. The coin landed heads up 125 times. Find the ratio of heads to total number of coin flips. Express as a simplified ratio.
- 5 to 7 (Incorrect. This is the ratio of heads to tails.)
- 7 to 12 (Incorrect. This is the ratio of tails to total coin flips.)
- 12 to 5 (Incorrect. This is the ratio of total coin flips to heads.)
- 5 to 12 (Correct. The ratio of heads to total coin flips is 125 to 300, which simplifies to 5 to 12.)
A: 5 to 12

Q: A factory bottles 375 bottles of juice in 5 minutes. Find the factory's unit rate of bottles per minute.
- 75:1 (Incorrect. The factory's bottling compares quantities with different units, so it can be described as a rate. This is a ratio.)
A: (a choice with no text)
Feedback: Incorrect. This is the correct rate, but not the unit rate. Remember to simply the rate for one unit.
Feedback: Incorrect. When you simplify the rate, be careful not to switch the units of measure. Remember to simply the rate for one unit.
Feedback: Correct. The rate is . Express the fraction with 1 in the denominator to find the number of bottles per minute.

Q: A 16-pound bag of Kitty Kibbles is $20.80. An 8-pound bag of Feline Flavor is $11.20. Which statement about the unit prices is true?
- Kitty Kibbles has a lower unit price of $1.30/pound. (Correct. The Kitty Kibbles rate is and the Feline Flavor rate is .)
- Feline Flavor has a lower unit price of $1.30/pound. (Incorrect. Be sure to pay attention to which brand of cat food has which unit price when solving.)
- Kitty Kibbles has a lower unit price of $1.40/pound. (Incorrect. Be sure to pay attention to which brand of cat food has which unit price when solving. Also note that this is not the lower unit price.)
- Feline Flavor has a lower unit price of $1.40/pound. (Incorrect. Find the unit price of each brand of cat food by writing a rate and then expressing the fraction with a denominator of 1. Compare the unit prices.)
A: Kitty Kibbles has a lower unit price of $1.30/pound.

Q: Which of the following proportions is false?
A: (a choice with no text)
Feedback: Correct. Compute the cross products: and . Because , the proportion is false.
Feedback: Incorrect. Compute the cross products. and . Because the products are equal, the proportion is true.
Feedback: Incorrect. Compute the cross products. and . Because the products are equal, the proportion is true.
Feedback: Incorrect. Compute the cross products. and . Because the products are equal, the proportion is true.

Q: Solve , for the unknown quantity, n.
A: (a choice with no text)
Feedback: Incorrect. Cross multiply. After you simplify, you must divide both sides by 36. Do not subtract the 36.
Feedback: Incorrect. Cross multiply. After you simplify, you must divide both sides by 36. Do not subtract 35.
Feedback: Correct. Cross multiply and use division to isolate the variable, n.
Feedback: Incorrect. Cross multiply. After you simplify, do not forget to divide both sides by 36.

Q: A high school soccer goalie blocked the ball from going into the goal 4 out of 5 times. If the ball was kicked toward the goal 20 times, how many blocks did the goalie make?
- 25 blocks (Incorrect. Be sure to set up the proportion correctly. This is the solution to . Each ratio should compare things in the same order, such as blocks to kicks. The correct proportion would have been .)
- 4 blocks (Incorrect. You may be thinking of the ratio of 20 kicks to 5 kicks, but this does not tell you how many blocks the goalie made. You need to set up a proportion and solve for the unknown number of blocks.)
- 16 blocks (Correct.)
- 1 block (Incorrect. Make sure to set up the proportion correctly. This is the solution to . Each ratio should compare things in the same order, such as blocks to total kicks. The correct proportion would have been .)
A: 16 blocks

Q: Alicia has 7 pairs of jeans and you’re wondering how many shirts she has, based on the ratio or rate of 5 shirts to one pair of jeans.
- 35 (Correct)
- 25 (Incorrect)
- 50 (Incorrect)
- 14 (Incorrect)
A: 35

Q: We know that 1 tablespoon = 3 teaspoons, and let’s say the recipe calls for 2 tablespoons. How many teaspoons are required by the recipe?
- 6 (Correct)
- 9 (Incorrect)
- 3 (Incorrect)
- 18 (Incorrect)
A: 6

Q: Convert 108 inches to yards
- 3 (Correct)
- 36 (Incorrect)
- 18 (Incorrect)
- 9 (Incorrect)
A: 3

Q: We have 13 meters of something and we want to know how many feet this is, what is the correct answer if 1 meter equals approximately 3.28 feet.?
- 42.64 (Correct)
- 45 (Incorrect)
- 3.96 (Incorrect)
- 39 (Incorrect)
A: 42.64