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daser333 [38]
3 years ago
6

Ethan throws a ball into the air from a cliff that is 152.4 m high with an initial velocity of 4 m/s. How long does it take for

the ball to hit the ground?
Mathematics
2 answers:
Dmitry_Shevchenko [17]3 years ago
8 0
38.1 seconds I believe simply divide 4m/s into 152.4 m and you will have 38.1 seconds
Sveta_85 [38]3 years ago
4 0
 <span>Use the formula that gives height in meters: h = –4.9t2 + v0t + h0. Substitute in the given values and solve.

I hope this helps; if it does please mark brainliest 

-Maranda</span>
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The correct answer is D but i don’t understand
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The answer depends on the way you solved it.

I am assuming you take the base on which you perceived to be: . 5 and height which is 2.


So you must've ended with 1

But in actuality, you need to use the equation above and plug in 1.5 and 1
Subtract them and you should get 1.25

Do the same to the other side, you should get 6.

.125 x 6  = .875

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3 years ago
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Biologists were studying the proportions of cats that had spotted markings on their fur in two populations of cats, C and F. An
alexandr1967 [171]

Answer:

If the proportions of all cats with spotted markings is the same for both populations, the probability of observing a sample difference of at least 0.62 is 0.01.

Step-by-step explanation:

p-value is the probability of observing a result which is at least as extreme as we calculated in our actual workings, assuming the Null hypothesis to be true.

The calculate p-value is 0.01. In the question statement we are given that the alternate hypothesis is:

"Population Proportions are not equal"

Since, Null and Alternate Hypothesis are negations of each other, the Null Hypothesis would be:

"Population Proportions are equal"

We assume the null hypothesis to be true, perform the tests on the sample and obtain a result.

The results we obtained is:

The sample difference is 0.62

Fitting all this data, in the definition of p value tell us that:

The probability of obtaining a sample difference of atleast 0.62 is 0.01, if the population proportions are same.

This matches with the option B. Therefore, the correct answer is:

If the proportions of all cats with spotted markings is the same for both populations, the probability of observing a sample difference of at least 0.62 is 0.01.

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3 years ago
The triangle and the rectangle below have the same area.
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Answer:

<h2>look at the photo...........................</h2>

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