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valentina_108 [34]

3 years ago

9

A rocket travels in a trajectory given by the equation s = -4.9t 2 + v0t, where s is meters above ground, t is time in seconds a

nd v0 is the initial velocity.
If the intial velocity is 49 m/sec, after how many seconds will the rocket reach its maximum height?

a. 5
b. 15
c. 10

1 answer:

Julli [10]3 years ago

8 0

C. Is your answer
Have any more questions? Please add in the comments
-Josh-

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A bandleader randomly select's two students out of 100 bandmembers if you and your brother are both bandmembers what is the prob

kherson [118]

<span>There are 100 * 99 = 9900 different ways to choose two students out of 100 bandmembers. You and our brother are 2 of that ways: you being selected first and you being selected second. Therefore the probability that you two are selected is 2 / 9900 = 0,000202. You can also think as the probability of you being selected among 100 bandmembers, which is 1/100, times the probability of your brother being selected among 99 members, which is 1/99 => (1/100) * (1/99) = 1/ (100*99) = 1 / 9900; plus the same for your brother being selected first and you second => [1/9900] * 2 = 2/9900, which is the same calculated above.</span>

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2 years ago

9x +y=-5<br> Coefficient of x

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2 years ago

Which value of x is a solution of the inequality?

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2 years ago

Read 2 more answers

URGENT WILL GET 20 and Brainlest

My name is Ann [436]

<em><u>The polynomial that represents the difference between the cost of distributing by train and the cost of distributing by truck is:</u></em>

$f(x) = -0.04x^2 + 18x + 75$

<em><u>Solution:</u></em>

<em><u>The cost of distributing by train can be modeled as:</u></em>

$-0.07x^2 + 40x - 105$

<em><u>The cost of distributing by truck can be modeled as:</u></em>

$-0.03x^2 + 22x - 180$

where x is the number of tons of product distributed

To find: Difference between the cost of distributing by train and the cost of distributing by truck

Difference = cost of distributing by train - cost of distributing by truck

Let f(x) = difference in cost between trains & trucks

$f(x) = (-0.07x^2+40x-105) - (-0.03x^2 +22x - 180)$

$f(x) = -0.07x^2 + 40x -105 + 0.03x^2 -22x + 180$

$Combine\ the\ like\ terms\\\\f(x) = -0.07x^2 +0.03x^2 + 40x - 22x +180-105\\\\Add\ the\ like\ terms\\\\f(x) = -0.04x^2 + 18x + 75$

Thus polynomial that represents the difference between the cost of distributing by train and the cost of distributing by truck is found

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3 years ago

What are 3 powers of 64?

andrew11 [14]

Answer:

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