A pair of shoes at a store costs $7.50. The total cost, in dollars is given by the function C(s) = 7.5s. What is the cost of 4 pairs of shoes?

A
$35

B
$30

C
$25

D
$50

Tom drove 206 miles in 3.9 hours. estimate his average speed.

If my mom gets $13.05 an hour, and she works from 3: 30 to 10: 45 in the morning, how much money does my mom make?

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?