Problem 11 :
What is the product of 2.52 and 3.4?
Solution :
In the answer, we should have 3 digits after the decimal.
So, the answer is 8.568.
Problem 12 :
At a store, Susan selected a pumpkin that weighed 35.2 ounces.
How much did Susan’s pumpkin cost?
Express the as dollars. cents.
Solution :
Converting the given quantity as pounds :
Weight of pumpkin = 35.2 ounces.
1 pound = 16 ounces
1 ounce = 1/16 pound
35.2 ounce = 35.2/16
= 2.2 pounds
Cost of 1 pound = $1.80
Required cost = 2.2(1.80)
= $3.96
Problem 13 :
What is the greatest whole number that is less than
Solution :
So, the greatest whole number is 27.
Problem 14 :
What is the value of
when x = 3?
Solution :
So, the answer is 5.
Problem 15 :
Heather earns $8.00 per hour for walking a dog. How many hours must she work to earn $256.00?
Solution :
Number of hours she should work = 256/8
= 32
So, he should she should work is 32 hours.
Problem 16 :
One serving of Mike’s crackers has 150 calories and a mass of 30 grams. How many calories are in 6 grams of the crackers?
A) 5 B) 10 C) 25 D) 30
Solution :
Calories in 30 grams = 150
Calories in 1 gram = 150/30
= 5
Calories in 6 grams = 5 x 6
= 30
Problem 17 :
The ratio of nitrogen to potassium in a sample of soil is 12:9. The sample has 36 units of nitrogen. How much potassium does the sample have?
A) 21 units B) 27 units C) 33 units D) 48 units
Solution :
Ratio between nitrogen to potassium = 12 : 9
Quantity of Nitrogen = 36 units
12 units = 36
1 unit = 36/12
= 3
9 units = 9(3)
= 27
So, option B is correct.
Problem 18 :
To clean a tank, 3/4 cup of disinfectant is needed for every 2 gallons of water. How many cups of disinfectant are needed for 20 gallons of water?
A) 7 1/2 B) 15 C) 33 1/2 D) 30
Solution :
Every 2 gallons of water = 3/4 cup of disinfectant
Multiplying by 10 on both sides.
20 gallons of water = (3/4) x 10
= 7.5 cups
So, 7 1/2 cups of disinfectant is needed.
Problem 19 :
A laundry detergent is sold at four stores.
Which store has the lowest price per ounce?
A) Hawkin’s Store B) Don’s Store
C) Allen’s Market D) Value Market
Solution :
Hawkin's store : 60 ounces = 6.50 1 ounce = 6.50/60 = 0.11 |
Don's store : 54 ounces = 5.50 1 ounce = 5.50/54 = 0.10 |
Allen's market : 48 ounces = 5.61 1 ounce = 5.61/48 = 0.12 |
Value market : 40 ounces = 4.50 1 ounce = 4.50/40 = 0.11 |
The least value is 0.10. So, answer is Don’s Store, option B.
Problem 20 :
Marcy is taking two types of medicine.
At what time will Marcy take both medicines together again?
A) 1:00 p.m. B) 3:00 p.m. C) 5:00 p.m. D) 9:00 p.m
Solution :
Least common multiple of 6 and 4 is 12
Then after 12 hours she will take medicines together.
So, the answer is 12 p.m, option D is correct.
May 21, 24 08:51 PM
May 21, 24 08:51 AM
May 20, 24 10:45 PM