#### Answer

$140

#### Work Step by Step

Given, Dan orders supplies for the science labs. Each of the 24 stations in the chemistry lab needs 2 ft of rubber tubing. The cost of rubber tubing is $8.75 per yard.
To find the cost to equip all the stations.
Step 1. The length of each station is 2 ft. There are 24 stations so total length is 24 * 2= 48 ft.
Step 2. Cost given is in per yard, so we need to convert the length in yards.
Use a unit fraction with yard (the unit for your answer) in the numerator, and feet (the unit being changed) in the denominator. Because 3 ft = 1 yard, the necessary unit fraction is
(1 yard)/(3 feet)
Multiply 48 ft times the unit fraction.
48 ft * (1 yard)/(3 feet) = 16 yard
Step 3. Now to calculate the cost per yard. We need to multiply $8.75 to 16 yard.
8.75 * 16 = $140
Therefore $140 will cost to equip all the stations.