Question

Eoin plans to purchase 6.50 pounds of cheese that costs $4.75 per pound. He used the following steps to estimate the cost.



Step 1: Round 6.50 pounds up to 7.
Step 2: Round $4.75 up to $5.00.

Step 3: Multiply 5 by 7 to get 35.

Step 4: Conclude that the cost will be just over $35.00. 



In which step does Eoin make a mistake?



A.In step 1, he should have rounded the weight down to 6 pounds. 

B.In step 2, he should have rounded the cost down to $4.00.

C.In step 3, he chose the wrong operation to calculate cost.

D.In step 4, he should have concluded the cost would be under $35.00

Answer 1

D Because it's the right answer

Answer 2

Eoin make a mistake in the step 4 i.e 
Eoin conclude that the cost will be just over $35.00. 


Option (D) is correct .

Explanation:

In the first step 
Eoin rounded up the 6.50 pounds of cheese to 7 .

In the second step 
Eoin rouunded up the $4.75 per pound of cheese to $5.00 .

In the third step the multiplication of the 7 pound of cheese to $5.00 (cost per pound of cheese ) is 35 .

There is the mistake in the fourth step .

Exact cost of the 7 pound of cheese is 35 not over $35 .

Therefore the 
Eoin should have concluded the cost would be under $35.00 .

Option (D) is correct .