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Aleonysh [2.5K]
3 years ago
15

If the population has gone up 20,000 in 6yr what percent is that

Mathematics
1 answer:
Sedaia [141]3 years ago
6 0
I think it is 3333% #I guessed
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plane is at altitude of 3500 ft and angle of elevation from airport to plane is 29 degrees. whats the horizontal distance betwee
lesya692 [45]
Sorry i don't know it 
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2 years ago
Will mark brainliest
Arlecino [84]

Answer:

17

Step-by-step explanation:

D = 8.5 miles/h x 2h

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3 0
2 years ago
A study is performed in San Antonio to determine whether the average weekly grocery bill per five-person family in the town is s
bogdanovich [222]

Answer:

No, the sample evidence is not statistically significant (P-value = 0.125).

To reject the null hypothesis, the P-value has to be smaller than the significance level, so the significance level to reject the null hypothesis has to be 0.125 or higher.

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that the average weekly grocery bill per five-person family in San Antonio is significantly different from the national average.

Then, the null and alternative hypothesis are:

H_0: \mu=131\\\\H_a:\mu\neq 131

The significance level is 0.05.

The sample has a size n=50.

The sample mean is M=133.474.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=11.193.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{11.193}{\sqrt{50}}=1.583

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{133.474-131}{1.583}=\dfrac{2.474}{1.583}=1.563

The degrees of freedom for this sample size are:

df=n-1=50-1=49

This test is a two-tailed test, with 49 degrees of freedom and t=1.563, so the P-value for this test is calculated as (using a t-table):

P-value=2\cdot P(t>1.563)=0.125

As the P-value (0.125) is bigger than the significance level (0.05), the effect is  not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that the average weekly grocery bill per five-person family in San Antonio is significantly different from the national average.

8 0
2 years ago
In the right triangle shown below, what is the sine of angle θ?
algol [13]

Step-by-step explanation:

In given rt.angled triangle,

Sin thita =p/h

=26.1/28.7

=0.9094

So correct answer is option D.

3 0
2 years ago
Beatrice contributes 18% of her $59,800 annual salary to her 401(k) plan. What is her pre-tax income?
nalin [4]

<span>B. $49,036 hope helps APEX </span>
7 0
3 years ago
Read 2 more answers
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