Answer:
area = 24 yd²
Step-by-step explanation:
convert the dimensions into yards using the conversion
1 yard = 3 feet
24 feet = 
= 8 yards
9 feet = 
= 3 yards
area = length × width = 8 × 3 = 24 yd²
Suppose that this person drives at r mph going to the mountains, and gets there in 12 hours. Returning, this person drives at (r+20) mph and gets home in 8 hours. We don't know the distance yet, but can solve for the initial speed, r, by setting
d = 12r = (r+20)(8). Solving for r, r=40 mph (going) and (40+20)mph = 60 mph (returning. Since d=12 r, d = (12 hrs)(40 mph) = 480 miles (answer).
(9.69 ¢/km)*(7580 km) = 73450.2 ¢ = $734.50
