Mrs. Hara wants to purchase blue light blocking glasses for her family. Company 1 sells the glasses for $40 each, and Company 2 sells the same glasses at 4 for $140. How much will Mrs. Hara save, per pair of glasses is she uses Company 2?

Question

A: $20.00
B: $5.00
C: $75.00
D:$100.00

Answer 1

To find out how much Mrs. Hara will save per pair of glasses if she uses Company 2, we need to compare the price of Company 2 to the price of Company 1.

The cost of 4 pairs of glasses from Company 2 is $140, so the cost of 1 pair of glasses is $140/4 = $<<140/4=35.00>>35.00.

If Mrs. Hara uses Company 1, the cost per pair of glasses is $40, so she would save $40 - $35 = $<<40-35=5.00>>5.00 per pair of glasses.

Therefore, the correct answer is B: $5.00.