# Worksheet: Writing and Evaluating Formulas

In this worksheet, we will practice distinguishing between formulas and expressions, writing a formula from a given description, and substituting numbers into a simple formula.

**Q1: **

Use the formula to find the area of a parallelogram whose base, , is and height, , is .

- A
- B
- C2
- D
- E

**Q4: **

A company produces greetings cards with an initial cost of 2,000 LE and an extra cost of per card. The total cost is given by , where is the number of produced cards. Find the total cost of producing 15,000 cards.

**Q5: **

The total surface area, , of a rectangular prism is given by . Find the value of when , , and .

**Q6: **

The speed , in feet per second, of an ocean wave at depth , in feet, is given by the formula . Determine, to the nearest tenth, the speed of an ocean wave at a depth of 11 feet.

**Q7: **

A rectangle has width and length . A new rectangle is formed which has the same length but double the width. Find the perimeter and area of this new rectangle.

- A,
- B,
- C,
- D,
- E,

**Q8: **

The diameter of a circle with area is given by
. Determine, to the nearest tenth, the diameter of a circle with an
area of 46 in^{2}.

**Q9: **

Daniel drove his car for 7 hours at 50 miles per hour. Use the formula , where , , and , to find the distance he drove.