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3 years ago

A shoreline is eroding at a rate of 1/3 foot per 3 months . How many feet are eroding per year?

Mathematics

1 answer:

Tatiana [17]3 years ago

4 0

There are 12 months in a yr so 12/3=4 then 1/3x4=4/3 so 1ft and 1/3 erode each yr. C is the correct answer

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Suppose 241 subjects are treated with a drug that is used to treat pain and 54 of them developed nausea. Use a 0.05 significance

lana66690 [7]

Answer:

Null Hypothesis, $H_0$ : p = 0.20

Alternate Hypothesis, $H_a$ : p > 0.20

Step-by-step explanation:

We are given that 241 subjects are treated with a drug that is used to treat pain and 54 of them developed nausea.

We have to use a 0.05 significance level to test the claim that more than 20% of users develop nausea.

Let p = population proportion of users who develop nausea

So, Null Hypothesis, $H_0$ : p = 0.20

Alternate Hypothesis, $H_a$ : p > 0.20

Here, null hypothesis states that 20% of users develop nausea.

And alternate hypothesis states that more than 20% of users develop nausea.

The test statistics that would be used here is One-sample z proportion test statistics.

T.S. = $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ~ N(0,1)

where, $\hat p$ = proportion of users who develop nausea in a sample of 241 subjects = $\frac{54}{241}$

n = sample of subjects = 241

So, the above hypothesis would be appropriate to conduct the test.

6 0

3 years ago

A playground has the shape of a trapezoid.

Dmitrij [34]

Answer:

short base: 6 yards
long base: 8 yards

Step-by-step explanation:

Our understanding of your figure is shown below.

The question says the "shortest side" and the "width" have the same dimension. If the "width" is a reference to "height 6 yards", then it seems the "shortest side" is 6 yards. Since the slant sides are longer than the height, the "shortest side" is also the "short base."

The short base is 6 yards.

The long base overhangs the short base by 1 yard on either end, so it is a total of 2 yards longer than the short base. It it 6+2 = 8 yards long.

The long base is 8 yards.

6 0

3 years ago

Enter the terms and the coefficients of the expression. −80 + 5p − 8z The terms are . The coefficients are .

9966 [12]

Answer:

Step-by-step explanations:

Hi love ,

So the terms is :

-80 , 5p , -8z

and the coefficients is :

5 , -8

Thank you :)

8 0

3 years ago

Gabriel has $0.80 worth of pennies and

Juliette [100K]

Answer:

nickels=13 and pennies=15

Step-by-step explanation:

0.05n+0.01p=0.80

-0.01(n+p=28)

0.05n+0.01p=0.80

-0.01n-0.01p= -0.28

0.04n=0.52

n=13

p=15

4 0

3 years ago

Ava is driving home from college this winter holiday. She travels 60 miles during the 1st hour of her trip. If she continues at

Sladkaya [172]

Answer: 5.5 hours

Step-by-step explanation:

distance/speed = time

330/60 = 5.5

6 0

3 years ago

Read 2 more answers