Carla needs to complete her science homework. She has 20 pages to read and 14 questions to answer. If it takes Carla 10 minutes to read 4 pages, how many minutes will it take her to read the full assignment?
A. 35 minutes
B. 50 mintues
C. 9 minutes
D. 85 minutes
If Carla takes 10 minutes to read 4 pages, then it will take her 10/4 = 2.5 minutes to read each page.
If Carla has 20 pages to read, then it will take her 2.5 * 20 = <<2.5*20=50>>50 minutes to read the full assignment.
Therefore, Carla will take 50 minutes to read the full assignment, so the answer is B. 50 minutes.
Luis is making chocolate chip cookies. The recipe calls for 1/8 cup of almonds for every 3/4 cup of chocolate chips. If Luis uses 3 cups of chocolate chips, how many cups of almonds will he need? Round to the nearest tenth.
A. 0.5 cup
B. 18.0 cups
C. 0.4 cup
D. 0.8 cup
According to the recipe, Luis needs 1/8 cup of almonds for every 3/4 cup of chocolate chips.
To calculate the amount of almonds needed for 3 cups of chocolate chips, we can set up a proportion:
(1/8 cup almonds) / (3/4 cup chocolate chips) = (x cups almonds) / (3 cups chocolate chips)
Cross-multiplying, we get:
(1/8) * (3) = (3/4) * (x)
3/8 = 3x/4
Multiplying both sides by 4, we get:
3 = 3x
Dividing both sides by 3, we get:
x = 1
Therefore, Luis will need 1 cup of almonds for 3 cups of chocolate chips.
Therefore, the answer is D. 1 cup.
Lenny is making his own laundry soap. The recipe calls for 2 parts borax, 2 parts washing soda, and 1 part soap flakes.
If Lenny uses 7 cups of soap flakes, how many cups of borax and washing soda combined does he need?
A. 7 cups
B. 21 cups
C. 28 cups
D. 14 cups
The ratio of borax to washing soda to soap flakes is 2:2:1.
If Lenny uses 7 cups of soap flakes, we need to determine the total amount of borax and washing soda combined.
Let's assume the amount of borax needed is 2x and the amount of washing soda needed is also 2x.
So, according to the ratio, the amount of soap flakes needed is 1x.
Therefore, 1x = 7 cups.
Simplifying, we find that x = 7 cups.
Thus, Lenny needs 2x = 2 * 7 = 14 cups of borax and 2x = 2 * 7 = 14 cups of washing soda.
Therefore, the total amount of borax and washing soda combined that Lenny needs is 14 + 14 = 28 cups.
So, the correct answer is C. 28 cups.
Lisa adds 2 tsp baking soda to 6 lbs. of flour. How much baking soda should she add to 9 lbs. of flour?
A. 18 tsp
B. 9 tsp
C. 3 tsp
D. 27 tsp
If Lisa adds 2 teaspoons of baking soda to 6 pounds of flour, this means the ratio of baking soda to flour is 2 teaspoons / 6 pounds.
To find out how much baking soda she should add to 9 pounds of flour, we can set up a proportion:
(2 teaspoons) / (6 pounds) = (x teaspoons) / (9 pounds)
Cross-multiplying, we get:
(2) * (9 pounds) = (6 pounds) * (x teaspoons)
18 = 6x
Dividing both sides by 6, we get:
x = 3
Therefore, Lisa should add 3 teaspoons of baking soda to 9 pounds of flour.
So, the correct answer is C. 3 tsp.