4: 5 ptsA stoplight has the following cycle
Question
Question 4: 5 ptsA stoplight has the following cycle: green for 50 seconds, yellow
for 4 seconds, and red for 62 seconds. If you arrive at the light 50 times, predict how many times you will have to stop and wait more than 4 seconds.
About 2 times
About 50 times
About 27 times
About 25 times
Question 5: 5 pts
Identify the area of a regular decagon with side length 2m rounded to the nearest tenth.
A ≈ 123.1 m2
A ≈ 69.2 m2
A ≈ 7.7 m2
A ≈ 30.8 m2
Question 6: 5 pts
Find the area of the parallelogram.
A = 340 cm2
A = 300 cm2
A = 476 cm2
A = 420 cm2
Question 10: 5 pts
The radius of a circle is multiplied by 1/4. Which of the following describes the effect of this change on the area?
The area is multiplied by 1/16.
The area is multiplied by 4.
The area is multiplied by 1/4.
The area is multiplied by 1/8.
Question 11: 5 pts
Identify the base of a triangle in which h=5 ft and A=(5x+20)ft2.
b = (2x + 8) ft
b = (x + 6) ft
b = (x + 4) ft
b = (5x + 25) ft
Question 13: 5 pts
A diagonal length of a rhombus is multiplied by 2/3. Which of the following describes the effect of this change on the area?
The area is multiplied by 9/4.
The area is multiplied by 4/9.
The area is multiplied by 3/2.
The area is multiplied by 2/3.
Question 16: 5 pts
Identify the perimeter of a square in which A=121×2 in2.
P = 44x in.
P = 44x2 in.
P = 22x in.
P = 22x2 in.
Question 19: 5 pts
An advertiser rents a rectangular billboard that is 21.5ft wide and 13ft tall. The rent is $12 per square foot. For a billboard three times as tall, the advertiser has to pay $30,186. Is this reasonable? Explain.
Yes; when the height is tripled, the area is multiplied by 1/3.
Yes; when the height is tripled, the area is multiplied by 9.
No; when the height is tripled, the area is multiplied by 9.
No; when the height is tripled, the area is also tripled.
Question 20: 5 pts
Identify the area of the polygon with vertices P(1,2), Q(1,4), R(−1,6), and S(−3,2).
A = 14 units2
A = 16 units2
A = 6 units2
A = 10 units2
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