Graded Quiz: Decimals
Question 3 (5 points)
If a 10-pound sack of potatoes costs $6.55, how much would 1 pound cost? Round your answer to the nearest cent.
Answer (1)
Divide the total cost of the sack of potatoes by the number of pounds: 10 6.55 = 0.655 .
Round the result to the nearest cent: 0.655 ≈ 0.66 .
The cost of 1 pound of potatoes is approximately $0.66 .
Explanation
Problem Analysis We are given that a 10-pound sack of potatoes costs $6.55. We want to find the cost of 1 pound of potatoes. To do this, we will divide the total cost by the number of pounds in the sack.
Setting up the Equation Let the cost of 1 pound of potatoes be x . We can set up the equation:
10 x = 6.55
To solve for x , we divide both sides of the equation by 10:
x = 10 6.55
Calculating the Cost Now, we perform the division:
x = 0.655
Since we need to round the answer to the nearest cent, we look at the third decimal place. Since it is 5, we round up the second decimal place.
x ≈ 0.66
Final Answer Therefore, the cost of 1 pound of potatoes is approximately $0.66.
Examples
Imagine you are at the grocery store and see a 5-pound bag of apples priced at $4.50. You want to know the price per pound to compare it with another type of apple sold individually. By dividing the total cost ($4.50) by the number of pounds (5), you find that each pound costs $0.90. This helps you make an informed decision about which apples to buy based on the price per pound.
