**If a box of 45 syringes costs $720.00, which of the following is the cost of five syringes?**

$75.00

$66.00

$82.00

$80.00

*Correct Answer : D*

From the cost of 45 syringes, we are required to find the cost of 5 syringes. We set up a proportion equation by letting the cost of 5 syringes to y. Besides, we let the cost to be numerator and number of syringes to be denominator as follows.

Solve the value of y by cross products

Divide both sides by 45

Therefore, 5 syringes will cost $80.00.

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