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Licemer1 [7]
3 years ago
7

What's the answer to this math problem?

Mathematics
1 answer:
m_a_m_a [10]3 years ago
8 0

Answer:

take the numbers and do the equation steps then fill the box in

Step-by-step explanation:

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the memory card on a digital camera can hold about 430 pictures.briana used 20% of the memory card while taking pictures at a fa
Dahasolnce [82]

Answer:

86

Step-by-step explanation:

I am pretty sure.

5 0
3 years ago
An online streaming service providing television programs claims that a 30-minute program will stream with advertisements that a
trapecia [35]

Answer:

The p-value is significantly low(<0.01), which means that the data provides convincing evidence that the true mean advertisement length is longer than 45 seconds.

Step-by-step explanation:

An online streaming service providing television programs claims that a 30-minute program will stream with advertisements that average 45 seconds. Test if the true mean advertisement length is longer than 45 seconds.

At the null hypothesis, we test if the mean time is of 45 seconds, that is:

H_0: \mu = 45

At the alternate hypothesis, we test if the mean is more than 45 seconds, that is:

H_1: \mu > 45

The test statistic is:

t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, s is the standard deviation and n is the size of the sample.

45 is tested at the null hypothesis:

This means that \mu = 45

They recorded the times of 21 randomly selected advertisements. The mean and standard deviation for these times are 46.67 and 2.78.

This means that n = 21, X = 46.67, s = 2.78

Value of the test-statistic:

t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}

t = \frac{46.67 - 45}{\frac{2.78}{\sqrt{21}}}

t = 2.75

P-value of the test and decision:

The p-value of the test is the probability of finding a sample mean above 46.67, which is a right-tailed test, with t = 2.75 and 21 - 1 = 20 degrees of freedom.

With the help of a calculator, this p-value is of 0.0062.

The p-value is significantly low(<0.01), which means that the data provides convincing evidence that the true mean advertisement length is longer than 45 seconds.

6 0
3 years ago
I don’t understand any of this
Nookie1986 [14]

Answer:

1. 1244.07

2. 653.45

3. 706.86

4. 141.37

5. 2309.07

6. 402.12

7. 863.94

8. 2001.19

9. 197.92

Step-by-step explanation:

6 0
2 years ago
A skateboarding ramp is 12 in. high and rises at an angle of 21​°. How long is the base of the​ ramp? Round to the nearest inch.
bagirrra123 [75]

Answer:

the base of the ramp is 31 inches long.

Step-by-step explanation:

c = a/sin(α)

= 33.48514

b = √c2 - a2

= √33.4851373155042 - 122

= √977.25442103816

= 31.26107

3 0
2 years ago
Find the slope of the horizontal line that passes through the points (5,3) and (8,3)
elena-14-01-66 [18.8K]
The slope is 0 the equation of the line is y=3
6 0
3 years ago
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