### 1.8 Formulas

Problem #

Problem Statement

Problems Similar To

1.

Find the area in square inches of a triangle whose base (b) is 6 inches and whose height (h) is 7 feet using the formula Area = (1/2)*b*h. (Note: 1 foot is 12 inches).

$$\frac{1}{2} \times 6 \times 12 \times 7$$

2.

Find the surface area of a box in square feet using the formula S = 2(L*W + L*H + W*H) if L = 9 feet, W = 10 feet, and H = 4 feet.

$$2 \times (9 \times 10+9 \times 4+10 \times 4)$$

3.

Find the distance (d) in miles traveled by a person whose speed (r) is 4 miles/hour for 15 minutes using the formula d = r*t.

$$\frac{15}{60} \times 4$$

4.

It takes 1/9 of an hour to travel 5 miles to work, what is the average speed in miles/hour?

$$9 \times 5$$

5.

On winter day, the highest temperature was 9 degrees F, and the lowest was -10 degrees F. What is the variation in the day's temperature?

$$9-(-10)$$

6.

You are making candles for your friends. A mold for the candles costs $\$10 $and wax to make one candle costs$ \$9$. You make 3 candles. Find total cost.

$$10+9 \times 3$$

7.

Degrees Celsius C can be converted to degrees Fahrenheit F using the expression (9/5)*C + 32 = F. The hottest recorded day in Place P was 5 degrees C. Convert this temperature to degrees F.

$$\frac{9}{5} \times 5+32$$

8.

After a recent snowfall, the snow on the ground in a shaded area is melting at a rate of 1/100 inches/minute. Currently, there are 10 inches of snow on the ground. If the snow continues melting at this rate, how much snow will be on the ground in 3 hours?

$$10-(\frac{3 \times 60}{100})$$