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3 years ago

Solve the question below

Mathematics

1 answer:

mamaluj [8]3 years ago

7 0

Answer: the scale factor is 2.5

Step-by-step explanation: hope it helps :)

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When the weather is nice, you usually ride your bike to school. At 7:30 1 point

atroni [7]

Answer:

5 mph

Step-by-step explanation:

7:30 to 7:45 is 15 minutes.

The bike trip is 3 miles.

By doing 15 / 3, your answer would be 5.

3 0

3 years ago

An article reported that, in a study of a particular wafer inspection process, 356 dies were examined by an inspection probe and

Marta_Voda [28]

Answer:

The 95% confidence interval for the proportion of all dies that pass the probe is (0.637, 0.733).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

356 dies were examined by an inspection probe and 244 of these passed the probe.

This means that $n = 356, \pi = \frac{244}{356} = 0.685$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a p-value of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.685 - 1.96\sqrt{\frac{0.685*0.315}{356}} = 0.637$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.685 + 1.96\sqrt{\frac{0.685*0.315}{356}} = 0.733$

The 95% confidence interval for the proportion of all dies that pass the probe is (0.637, 0.733).

4 0

3 years ago

The ratio of the three angles of a triangle is 2:4:6. What is the measure of the SMALLEST angle?

kirill [66]

The measures of the angles are 30, 60 and 90 degrees.
Explanation:
I assume the question should read "the measures of the ANGLES of the triangle are in the ratio 2:4:6.
If the angles are in the proportion 2:4:6, the measures of the angles have the same scale factor
x
. And, the sum of the measures of the angles of a triangle is
180
.
⇒
2
x
+
4
x
+
6
x
=
180

12
x
=
180

12
x
12
=
180
12

x
=
15

The measures of the angles are:
2
x
=
2
(
15
)
=
30

4
x
=
4
(
15
)
=
60

6
x
=
6
(
15
)
=
90

7 0

3 years ago

The variable used to show correlation is r, which is also known as the correlation constant?

labwork [276]

Answer:

FALSE

Correlations tell us the strength and the direction of the relationship between two variables. The main result of a correlation is called the correlation coefficient (or "r").

Hope this helps and have a great day!!

$Sofia$

4 0

3 years ago

Read 2 more answers

A winery is supplied with crushed grapes once a week. If its weekly volume of sales in thousands of gallons is a random variable

alex41 [277]

Answer:

note:

solution is attached due to error in mathematical equation. please find the attachment

4 0

4 years ago