Steve ordered plastic cases for storing his baseball cards. each case has a length of 12 centimeters, a width of 6.5 centimeters ,and a height of 1.25 centimeters, what is the volume, in cubic centimeters, of one baseball card case?

For this case you should see the box as a rectangular prism.
 The volume of a rectangular prism is given by:
 V = (L) * (W) * (H)
 Where,
 L: length
 W: width
 H: height.
 Substituting the values we have:
 V = (12) * (6.5) * (1.25)
 V = 97.5 cm ^ 3
 
 the volume, in cubic centimeters, of one baseball card case is:
 V = 97.5 cm ^ 3

A) to solve for r, divide both sides by t.

R = d/t

B) divide total feet swam by time:

665,280 feet / 3 hours = 221,760 feet per hour

C) 1 mile = 5,280 feet. Divide feet per hour by 5280:

221,760/5280 = 42 miles per hour

D) long distances are usually calculated in miles because it’s smaller numbers which are easier to use in calculations.