Chapter 11 QuaDraTiC appliCaTionS 449Quiz
- The Marshalls own a hotel in a small coastal city. Their daughter, Ava, can clean
all the rooms in four for fewer hours than her little brother, Aidan, can clean
them. Working together, they can clean all the rooms in 2 hours 40 minutes.
Working alone, how long would Ava need to clean all the rooms?
a. 4 hours
b. 5 hours
C. 6 hours
D. 7 hours - A truck, traveling west at 42 mph, goes over an overpass at the same instant
a northbound train is passes underneath the overpass. The train is traveling at
40 mph. At these speeds, how long will it take the truck and train to be 29 miles
apart?
a. 20 minutes
b. 30 minutes
C. 40 minutes
D. 50 minutes - The area of a rectangle is 90 cm^2. If its length is 13 cm longer than its width, how
long is the rectangle?
a. 15 cm
b. 16 cm
C. 17 cm
D. 18 cm - The sum of two numbers is 18 and their product is 77. What is the larger number?
a. 10
b. 11
C. 12
D. 13 - An object is dropped from a height of 125 feet. It will hit the ground in about
a. 2.8 seconds.
b. 3 seconds.
C. 3.2 seconds.
D. The answer cannot be determined. - The volume of a rectangular box is 432 in^3. Its length is 8 inches, and its height
is 112 times its width. How tall is the box?
a. 4 inches
b. 5 inches
C. 7 inches
D. 9 inches