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victus00 [196]
3 years ago
8

The quadratic function h(t)=-16.1t^2 + 150 models a balls height, in feet, over time, in seconds, after it is dropped from a 15

story building.
- From what height, in feet, was the ball dropped?
-After how many seconds, rounded to the nearest hundredth, did the ball hit the ground?
Mathematics
1 answer:
zzz [600]3 years ago
4 0
In order to find height from where ball is dropped, you have to find height or h(t) when time or t is zero.So plug in t=0 into your quadratic equation:h(0) = -16.1(0^2) + 150h(0) = 0 +150h(0) = 150 ft is the height from where ball is dropped. When ball hits the ground, the height is zero. So plug in h(t) = 0 and solve for t.0 = -16.1t^2 + 15016.1 t^2 = 150t^2 = 150/16.1t = sqrt(150/16.1)t = ± 3.05Since time cannot be negative, your answer is positive solution i.e. t = 3.05 
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4 0
2 years ago
What is the value of x to the nearest tenth
Lerok [7]

Answer:

x ≈ 24.7

Step-by-step explanation:

Using the Sine rule in the triangle , that is

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3 years ago
A political pollster claims that 55% of voters prefer candidate A. To investigate this claim, a random sample of 75 voters is po
Elanso [62]

The null hypothesis is rejected because the probability is 0.52.

<h3>What are null hypotheses and alternative hypotheses?</h3>

In null hypotheses, there is no relationship between the two phenomena under the assumption that it is not associated with the group. And in alternative hypotheses, there is a relationship between the two chosen unknowns.

A political pollster claims that 55% of voters prefer candidate A.

To investigate this claim, a random sample of 75 voters is polled.

The pollster finds that 39 of those polled prefer candidate A.

He would like to know if the data provide convincing evidence that the true proportion of all voters who prefer candidate A is less than 55%.

This is left tailed test

H₀: p = 0.55

Hₐ: p < 0.55

Then the probability will be

p = 39 / 75

p = 0.52

P-value = 0.3015

Interpretation of P-value:- In a random sample of 75 voters, the chance of getting a sample statistic of 0.52 or below is 0.3015, assuming that the real population proportion of the voter base who chooses candidate A is 0.55.

More about the null hypotheses and alternative hypotheses link is given below.

brainly.com/question/9504281

#SPJ1

4 0
2 years ago
Pls help will mark brainliest
xxMikexx [17]

Answer:

The second one.

(-7 ,-4, -3, 5, 7)  

Step-by-step explanation:

the domain means the x values.

make me the brainliest by clicking the crown at the bottom of this answer

plzzz and thank you

3 0
3 years ago
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