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pishuonlain [190]
4 years ago
10

To reduce accidents at intersections, a town is considering installing traffic lights with "left turn on green arrow only" signs

. Which
measure best determines of the traffic lights and signs are necessary?
A
accidents per unprotected left turn per intersection
B. accidents per intersection
C
accidents per unprotected left turn per driver
D. accidents per intersection per day
Mathematics
1 answer:
harina [27]4 years ago
6 0

Answer:

A. accidents per unprotected left turn per intersection

Explanation:

The question is asking about "accidents at intersections," so the answer must be related to this.

It is said that accidents happen at intersections because cars coming from different directions are doing different activities. This causes a greater potential to cause an accident. An "unprotected left turn" happens when <u>there is no corresponding light (traffic light) that signals the left turn.</u> This is common among intersections.

The installation of the "left turn green arrow" is helpful for areas with unprotected left turn that may be potential for causing an accident. So among the choices above, letter A (accidents per unprotected left turn per intersection) is the best choice.

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a cone and a sphere have the same volume. the height of the cone is 96 units. what would be the values for the radius of the con
jolli1 [7]

The volume V_c of a cone  with base radius r_c and height h_c is

V_c = \dfrac{1}{3}\pi r_c^2 h_c

Similarly, the volume V_s of a sphere with radius r_s is

V_s = \dfrac{4}{3}\pi r_s^3

We know that V_c=V_s and that h_c=96

So, we can set up the following equation:

\dfrac{96}{3}\pi r_c^2=\dfrac{4}{3}\pi r_s^3

We can simplify the common denominator 3, and pi appearing on both sides:

96r_c^2=4r_s^3

We can divide both sides by 4:

24r_c^2=r_s^3

Without further information, this is all we can say: the cubed radius of the sphere is the same as 24 times the squared radius of the cone.

3 0
4 years ago
When 1600 is increased by 20% and the resulting number is decreased by y% the answer is 1536. Find the value of y?
svet-max [94.6K]
100% = 1600
120% = 1920

1920/120 = 1536/y
1920y = <span>184320 (cross multiply)
y = 96%
decrease of 24% from 1920</span>
7 0
3 years ago
I have been doing math all day, please help!
tester [92]
Substitute x and y with the value from table. The correct answer is A. 7=-3(-1)+4.
8 0
3 years ago
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An element with mass 800 grams decays by 8.2% per day. How much of the element is remaining after 15 days,
Serjik [45]

Given:

The initial mass of an element is 800 grams.

Decay rate = 8.2% per day

Number of days = 15

To find:

The remaining element after 15 days.

Solution:

The exponential decay model is

y=a(1-r)^t

Where, a is the initial value r is the rate of interest and t is time period.

Putting a=800,r=0.082,t=15 in the above formula, we get

y=800(1-0.082)^{15}

y=800(0.918)^{15}

y=221.68188

y\approx 221.7

Therefore, the mass of the remaining element is 221.7 grams.

7 0
3 years ago
Carol used 114 cups of flour in 2 muffins. How many cups of flour are needed to make 12 similar muffins?
son4ous [18]

Answer:

7 1/2 cups

Step-by-step explanation:

If Carol uses 1 1/4 cups of flour for 2 muffins, then she will need to repeat this conversion 6 times since she wants to make identical 12 muffins in all.

So, 1 1/4 * 6 = 7 1/2

Therefore, she needs 7 1/2 cups of flour

Hope that helps! :)

7 0
3 years ago
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