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2 years ago

7

Who can Help???

2 answers:

rosijanka [135]2 years ago

8 0

I'm not the best at writing, but I can try. so here's an idea:you can have as your scenario something like "On a vase shaped like a rectangular prism is a flower. Knowing that the stem of the flower is the diagonal of the prism, the diagonal of the base is 18 and the sinus of the angle between the stem and the diagonal(of the base) is 4/5, find the stem's length and the height of the vase"

GrogVix [38]2 years ago

3 0

Answer:

Answer:

Part 1: you know the height of the latter and the distance of the slide to the latter, but you don't know the length of the slide that needs to be replaced due to being broken.

i used a slide. the height of a ladder is 10 ft, the distance from the ladder and the end of the slide is 20 ft. so you needed to find the length of the slide to complete your "triangle".

i cannot add a picture so i hope you can work with that. you can also alter the numbers so that it isnt the same when you turn it in (turnitin will detect if another student put this answer) so i suggest altering the numbers.

here is my work:

10^2 + 20^2 = x^2

100 + 400 = x^2

500 = x^2

√500 = 22.360679775

22.360679775 = 22.3

x= 22.3

So the slide is about 22 feet long.

<u><em>please mark crown <3</em></u>

<u><em /></u>

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balandron [24]

Answer:

$n=\frac{0.93(1-0.93)}{(\frac{0.09}{1.96})^2}=30.875$

And rounded up we have that n=31

Step-by-step explanation:

First we need to find the critical value for the margin of error desired. The confidence level is 0.95 so then the significance is $\alpha=1-0.95=0.05$ and the critical value for this case would be:

$z_{\alpha/2} =\pm 1.96$

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

And on this case we have that $ME =\pm 0.09$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

The estimated proportion for this case is $\hat p =0.93$ . And replacing into equation (b) the values from part a we got:

$n=\frac{0.93(1-0.93)}{(\frac{0.09}{1.96})^2}=30.875$

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4 0

2 years ago

A rocket is launched from a tower. the height of the rocket, y in feet, is related to the time after launch, x in seconds, by th

GaryK [48]

Answer: $10.17\ seconds$

Step-by-step explanation:

Given the following Quadratic equation:

$y=-16x^2+153x+98$

The steps to solve it are:

1. Substitute $y=0$ into the equation:

$0=-16x^2+153x+98$

2. Use the Quadratic formula $x=\frac{-b\±\sqrt{b^2-4ac}}{2a}$ .

In this case:

$a=-16\\b=153\\c=98$

Substituting values into the Quadratic equation, you get (Round the values to the nearest hundreth):

$x=\frac{-153\±\sqrt{153^2-4(-16)(98)}}{2(-16)}\\\\x_1=10.17\\x_2=-0.60$

3. The positive value is the time that the rocket will hit the ground.

Therefore, the rocket will hit the ground after $10.17\ seconds$ .

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2 years ago

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liq [111]

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Step-by-step explanation: Isolate the variable by <u>dividing</u> each side by factors that doesn't contain the variable.

<em>Hope this helps!</em>

<em />

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2 years ago

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2 years ago