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amm1812
2 years ago
8

Help help help help

Mathematics
2 answers:
abruzzese [7]2 years ago
4 0

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Here we've been provided with the information given that radius (r) = 3.

And we have to find the circumference (c) of circle. And we have been provided with the formula i.e C = 2πr.

Placing (π = 3) in the above equation,

:\implies\tt{c = 2\pi r}

:\implies\tt{c = 2 \times 3 \times 3}

:\implies\tt{c = 6 \times 3}

:\implies\tt{c = 18}

  • The circumference of circle is 18cm.
Crank2 years ago
3 0

Answer:

  C = 18

Step-by-step explanation:

Put the numbers in place of their symbols and do the arithmetic. The diagram is showing you r = 3.

  C = 2πr

  C = 2(3)(3) . . . . . using 3 for π, as directed

  C = 18

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lidiya [134]

Answer:

  a)  No. t < 0 is not part of the useful domain of the function

  b) 2.0 seconds

Step-by-step explanation:

a) A graph of the function is shown below. It shows t-intercepts at t=-0.25 and t=2.0. We presume that t is measured forward from some event such as the ball being thrown or hit. The model's predicted ball location has no meaning prior to that event, when values of t are negative.

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b) It is convenient to use a graphing calculator to find the t-intercepts. Or, the equation can be solved for h=0 any of several ways algebraically. One is by factoring.

  h = 0 = -16t² +28t +8 . . . . . . . . . . . . the ball hits the ground when h = 0

  0 = -4(4t² -7t -2) = -4(4t +1)(t -2)

This has t-intercepts where the factors are zero, at t=-1/4 and t=2.

The ball will hit the ground after 2 seconds.

4 0
3 years ago
What is the kinetic Energy of a camion of 5,000 kg and turn at 100km/h ?
Alex787 [66]

Step-by-step explanation:

Given

mass (m) = 5000 kg

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6 0
3 years ago
students were asked to simplify the expression . two students' work is given. student a step 1: step 2: step 3: 1 tan2 θ step 4:
Whitepunk [10]

Student B is wrong , student A is correct in simplifying the expression .

Expression B must be simplified to cot θ .

Formulas to be used are :

1 - sin^{2} θ = cos^{2}θ

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Since , location of error is step 3 , we will start from there

[ ( 1 - sin^{2}θ ) / sin θ ] / cos θ    = [ ( 1 - sin^{2}θ ) / sin θ ] * [ 1 / cos θ ]

                          = ( 1 - sin^{2}θ ) / ( sin θ * cos θ )

               = cos^{2} θ / ( sin θ * cos θ )

                   = cot θ .

To know more on trigonometry follow link :

brainly.com/question/24349828

#SPJ4

Since , the question is incomplete we assume it to be :

6 0
2 years ago
2/5, -2/5, 5/6, -5/6. Which list of numbers is ordered from least to greatest
g100num [7]

Answer:

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Step-by-step explanation:

put the fractions in your calculator and then click the fraction to decimal button and press enter.

6 0
3 years ago
75, 75, 68, 11, 81, 69, 83, 13, 83<br> Calculate the range.
Fudgin [204]

Answer:

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We subtract the greatest from the smallest number in a set to find the range

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8 0
2 years ago
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