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nordsb [41]
3 years ago
7

If a car goes around a turn too quickly, it can leave tracks that form an arc of a circle. By finding the radius of the circle,

accident investigators can estimate the speed of the car. To find the radius, accident investigators choose points A and B on the tire marks. Then, the investigators find the midpoint C of AB¯¯¯¯¯¯¯¯. Use the diagram to find the radius r of the circle. Round your answer to the nearest tenth.
Mathematics
1 answer:
Slav-nsk [51]3 years ago
6 0

Answer:

155.7

Step-by-step explanation:

Use what you know.

Segment AC is 130 ft

Segment CD is 70ft

If you use the Pythagorean Theorem, in this case being  =  +

To find segment CE, you would do r-70

So,  =  +

= 16,900 +  -140r + 4900

Add the -140r to the left side and then get rid of the two . Then Add 16,900 and 4900 together

You'll end up with 140r = 21,800

Divide 140 on each side.

Your final answer will be 155.7 (rounded to the nearest tenth)

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Answer:


Step-by-step explanation:

1) False:  The function is decreasing (because the base, 1/3, is between 0 and 1).

2) True:  The function is decreasing (see #1, above)

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4) True:  If x is 0, then y = (1/3)^0 = 1.

5) False:  the range consists of the set of all real numbers greater than zero.

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3 years ago
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(x - 1)2 = 4<br> how do i do this
Gnoma [55]

Answer:

x = 3

Step-by-step explanation:

(x - 1)2 = 4

how to get this solved is very simple.

first step to apply is the BODMAS RULE

B..................... bracket

O..................... of

D.....................Division

M.................... multiplication

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S.................... Subtraction

so (x - 1)2 = 4

we have,

2x - 2 = 4 ( by opening the bracket)

collect the like terms

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divide both sides by 2

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MariettaO [177]
Draw an imaginary line from the vertex of angle x to the center of the circle.
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-4

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3+(-5)-2

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3 years ago
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