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vitfil [10]
2 years ago
12

Find the radius of a hemisphere with a volume of 106.1 cubic inches. Round to the nearest tenth if necessary.

Mathematics
1 answer:
True [87]2 years ago
8 0

Answer:

Step-by-step explanation:

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According to a 2014 research study of national student engagement in the U.S., the average college student spends 17 hours per w
Nadusha1986 [10]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = 17

For the alternative hypothesis,

µ < 17

This is a left tailed test.

Since the population standard deviation is not given, the distribution is a student's t.

Since n = 80,

Degrees of freedom, df = n - 1 = 80 - 1 = 79

t = (x - µ)/(s/√n)

Where

x = sample mean = 15.6

µ = population mean = 17

s = samples standard deviation = 4.5

t = (15.6 - 17)/(4.5/√80) = - 2.78

We would determine the p value using the t test calculator. It becomes

p = 0.0034

Since alpha, 0.05 > than the p value, 0.0043, then we would reject the null hypothesis.

The data supports the professor’s claim. The average number of hours per week spent studying for students at her college is less than 17 hours per week.

4 0
3 years ago
Giải phương trình y'=0 biết:y=x^4
Mila [183]

Answer:

0.

Step-by-step explanation:

1) y'=(x⁴)'=4x³;

2) ∡ y'=0, ⇒ 4x³=0; ⇒ x=0.

7 0
2 years ago
Express 0.7723 as a fraction
solong [7]
The answer is 3697/4787
3 0
2 years ago
Read 2 more answers
What is the distance between 23 and -8 on a number line?
elena55 [62]

Answer: 31

Step-by-step explanation:

To find the distance, find the difference between the number.

23 - (-8) = 31     So the distance is 31  units.

Note: To go from -8 to 23   you will have to add 31 to -8  and to go from  23 to -8 you will have to subtract 31 so the distance is 31

7 0
3 years ago
PLEASEEEEEE HELPPPPPPPP
Natali5045456 [20]
The formula for the sum of n terms in an arithmetic progression is:
S = n/2 * (2a + (n-1)d)
Here, the common difference, d, is 8 and the first term, a, is 1. Substituting these into the formula, we get:

S = n/2 * (2*1 + 8(n - 1))
S = n + 4n² - 4n
S = 4n² - 3n
The answer is A.
8 0
3 years ago
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