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4 years ago

Can someone please help me? I’m struggling . I’ll mark the correct answer most Brainly

Mathematics

1 answer:

mars1129 [50]4 years ago

8 0

You would add all of them together. Then since there is 4 round and green, you would do 4/23. The answer is .174
Hope this helped

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A ski resort has 18 inches of snow on the ground. The snow is falling at a rate of 4 inches per hour. Which type of functions be

AlexFokin [52]

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3 years ago

What is the volume of the following triangular prism?

sergiy2304 [10]

Answer:

Step-by-step explanation:

The formula of a volume of a prism:

$V=BH$

where

B - area of a base

H - height of a prism

In the base we have the right treiangle. The formula of an area of a right triangle is:

$A=\dfrac{ab}{2}$

where

a, b - are legs

We have

$a=6\ ft,\ b=8\ ft$

Substitute:

$B=\dfrac{(6)(8)}{2}=\dfrac{48}{2}=24\ ft^2$

Calculate the volume.

Substitute

$B=24\ ft^2,\ H=12\ ft$

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3 years ago

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Marysya12 [62]

Answer:

Step-by-step explanation:

7 0

3 years ago

Could someone answer this and explain an easier way to do this?

goblinko [34]

Answer:

Area of the figure = 109 cm. square

Step-by-step explanation:

The radius of the semi circle is 12 ÷ 2 = 6 cm.

Area of the semi circle = $\frac{1}{2}\pi(6^{2})=18\pi$

The radius of the quarter circle is 6 cm.

Area of the quarter circle = $\frac{1}{4}\pi(6^{2}=9\pi$

The area of the rectangle = 12 × 2 = 24

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3 0

3 years ago

. You are interested in the amount of time teenagers spend weekly working at part-time jobs. A random sample of 15 teenagers was

agasfer [191]

Answer:

$t=\frac{147.3-120}{\frac{50}{\sqrt{15}}}=2.115$

Now we can calculate the degrees of freedom

$df=n-1=15-1=14$

If we find a critical value in the t distribution with 14 degrees of freedom who accumulates 0.05 of the area in the right we got $t_{critc}= 1.761$

Since the calculated value is higher than the critical value we have enough evidence to conclude that the true mean is significantly higher than 120 minutes for the average time of part time jobs

Step-by-step explanation:

Information given

$\bar X=147.3$ represent the sample mean for the amount of time spent at part time jobs

$s=50$ represent the sample standard deviation

$n=15$ sample size

$\mu_o =120$ represent the value to check

$\alpha=0.05$ represent the significance level

t would represent the statistic

$p_v$ represent the p value for the test

System of hypothesis

We want to analyze if the true mean for the amount of time spent at part time jobs is higher than 120, the system of hypothesis would be:

Null hypothesis: $\mu \leq 120$

Alternative hypothesis: $\mu > 120$

Since we don't know the population deviation the statistic is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

Replacing the info given we got:

$t=\frac{147.3-120}{\frac{50}{\sqrt{15}}}=2.115$

Now we can calculate the degrees of freedom

$df=n-1=15-1=14$

If we find a critical value in the t distribution with 14 degrees of freedom who accumulates 0.05 of the area in the right we got $t_{critc}= 1.761$

Since the calculated value is higher than the critical value we have enough evidence to conclude that the true mean is significantly higher than 120 minutes for the average time of part time jobs

4 0

3 years ago