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Novosadov [1.4K]
3 years ago
15

A spinner has 6sectors half are red and half of which is black if the radius of the spinner is 3 inches what is the area of the

red sectors
Mathematics
1 answer:
lora16 [44]3 years ago
7 0

Answer:

HIIII!!!

Step-by-step explanation:

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A stone is launched into the air from a height of 240 feet. The height, h, of the stone, in feet, t seconds after launch is give
rosijanka [135]

A projectile is an object <u>launched</u> into space, and moving under the <em>influence</em> of <u>gravity</u> and <u>momentum</u>. The <em>stone</em> here is an example. Thus, the <em>time</em> taken for the stone to reach the ground is 10 seconds.

On <em>launching</em> of the stone into <u>space</u>, it behaves as a <u>projectile</u>. Thus moving under the <em>influence</em> of gravity and its momentum. Its <u>momentum</u> is the <em>product</em> of its <u>mass </u>and <u>velocity</u>.

The height h, is given as:

h = 16t^{2} + 32t + 240

Differentiating the expression with respect to t, we have;

32t + 32 = 0

t = -1 seconds

Substitute the value of time, t, in the equation for the height;

h = 16 - 32 + 240

  = 224

h = 224 m

Total height, S = 240 + 224

                         = 464

S = 464 m

The total height covered by the stone is 464 m.

From the second equation of <em>free fall</em>,

S = Ut + \frac{1}{2}gt^{2}

S = \frac{1}{2}gt^{2}

464 = \frac{1}{2}*9.8*t^{2}

t^{2} = \frac{928}{9.8}

  = 94.694

t = \sqrt{94.694}

 = 9.7311

t ≅ 10 seconds

The <em>time taken</em> for the stone to hit the ground is 10 seconds.

Thus option A is the required answer.

Visit: brainly.com/question/13834669

7 0
2 years ago
Ezra is training for a track race. He starts by sprinting 100 yards. He gradually increases his distance, adding 5 yards a day f
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On the 21st day, he sprints 205 yards.

Is that what you meant for the problem

or do u want to know how many yards he sprinted total for the 21 days
If it is,
he sprinted a total of 3390 yards
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3 years ago
Read 2 more answers
Mr. Young has a section of his parking lot, measuring 10 yards by 12 yards, that needs to be replaced. The paving company told M
Evgesh-ka [11]

Answer:

36.9230769231

Step-by-step explanation:

10*12

ans/3.25

7 0
3 years ago
Acellus
LekaFEV [45]

Answer:

1 and 5 out of 12

Step-by-step explanation:

Katie:9/12

Tori:8/12

9+8 =17/12 = 1 and 5/12 and this is already in the simplest form

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3 years ago
Jack and Jane are married and both work. However, due to their responsibilities at home, they have decided that they do not want
xz_007 [3.2K]

By setting up a system of equations we can easily solve this problem. Let's denote Jane's working hours with x and Jack's working hours with y. Since they don't want to work more than 65 hours, the first equation is x+y=65. The second equation is 14x+7y=770. By solving this system of equation , we find that y=20 hours, which is Jack's maximum working hours. 

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