AnswersCA-Common Core Math II A-CRModeling with Quadratic Equations

Modeling with Quadratic Equations Answers

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1
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6 cm8 cm10 cm12cm

A
6 cm
B
8 cm
C
10 cm
D
12cm
2
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24 cm28 cm30 cm40 cm

A
24 cm
B
28 cm
C
30 cm
D
40 cm
5

An object is launched into the air. The projectile motion of the object can be modeled using the functionh(t) = –16t2 + 72t + 5, where t is the time in seconds since the launch and h(t) represents the height in feet of the object after t seconds. What is true about the projectile motion of this object? Check all that apply.The initial height is 5 feet.The initial velocity of the object is –72 feet/second.The object will hit the ground after approximately 4.57 seconds.After 3 seconds, the object is 173 feet high.At t = 0, h(t) = 0.

A
The initial height is 5 feet.
B
The initial velocity of the object is –72 feet/second.
C
The object will hit the ground after approximately 4.57 seconds.
D
After 3 seconds, the object is 173 feet high.
E
At t = 0, h(t) = 0.
6

What is the approximate value of the hypotenuse?

A
10 inches
B
10.25 inches
C
20.25 inches
D
81 inches
7

after 1.5 secondsafter 3.0 secondsafter 6.0 seconds.

A
after 1.5 seconds
B
after 3.0 seconds
C
after 6.0 seconds.
8

A "golden rectangle” is a rectangle where the ratio of the longer side to the shorter side is the "golden ratio.” These rectangles are said to be visually pleasing. An example of a "golden rectangle” has a length equal to x units and a width equal to x – 1 units. Its area is 1 square unit. What is the length of this golden rectangle?

A
Option
B
Option
C
Option
D
Option
9

after 2.5 secondsafter 5.0 secondsafter 6.0 seconds

A
after 2.5 seconds
B
after 5.0 seconds
C
after 6.0 seconds

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