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Bad White [126]
3 years ago
12

At a middle school, 95 students have freckles. There are 382 students in the school. To the nearest tenth of a percent, what per

cent of the students have freckles?

Mathematics
1 answer:
Novay_Z [31]3 years ago
5 0

Answer:

D. 24.9

Step-by-step explanation:

95/382 converted to a percentage is 24.9

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Easy question for easy points
poizon [28]

Answer:

50 berries left over

Step-by-step explanation:

55 berries     1700 berries

--------------- = -------------------

1 jar                   x jars

Using cross products

55x = 1700*1

Divide each side by 55

55x/55 = 1700/55

x = 1700/55

Changing to a mixed number

55 goes into 1700 30 times

30 *55 =16501700-1650 = 50

x = 30 50/55 = 30 10/11

There are 50 berries left over

5 0
3 years ago
Read 2 more answers
Solve for y -9x+y=6. how can you get y .
Roman55 [17]
Pretty much you’re going to need to subtract the -9x to get it on the other side, so that you get y= 9x+6

3 0
3 years ago
Answer -7 x (-9) = ?<br><br>Thank You!
artcher [175]
   <span>-7 x (-9) = +63  

because  if we multiply  negative by negative we obtain +</span>
5 0
3 years ago
The circumference of a circular table top is 283.48 inches. Find the area of this table top. Use 3.14 for piπ
velikii [3]

\pi \times r {}^{2}  \\ 3.14 \times  {283.48}^{2}  =

252,333.258656 inches 2

I think something is wrong here

6 0
3 years ago
If t follows a t7 distribution, find t0 such that (a) p(|t | &lt; t0) = .9 and (b) p(t &gt; t0) = .05.
Thepotemich [5.8K]

Answer:

a) P(-t_o < t_7

Using the symmetrical property we can write this like this:

1-2P(t_7

We can solve for the probability like this:

2P(t_7

P(t_7

And we can find the value using the following excel code: "=T.INV(0.05,7)"

So on this case the answer would be t_o =\pm 1.895

b) For this case we can use the complement rule and we got:

1-P(t_7

We can solve for the probability and we got:

P(t_7

And we can use the following excel code to find the value"=T.INV(0.95;7)"

And the answer would be t_o = 1.895

Step-by-step explanation:

Previous concepts

The t distribution (Student’s t-distribution) is a "probability distribution that is used to estimate population parameters when the sample size is small (n<30) or when the population variance is unknown".

The shape of the t distribution is determined by its degrees of freedom and when the degrees of freedom increase the t distirbution becomes a normal distribution approximately.  

The degrees of freedom represent "the number of independent observations in a set of data. For example if we estimate a mean score from a single sample, the number of independent observations would be equal to the sample size minus one."

Solution to the problem

For this case we know that t \sim t(df=7)

And we want to find:

Part a

P(|t|

We can rewrite the expression using properties for the absolute value like this:

P(-t_o < t_7

Using the symmetrical property we can write this like this:

1-2P(t_7

We can solve for the probability like this:

2P(t_7

P(t_7

And we can find the value using the following excel code: "=T.INV(0.05,7)"

So on this case the answer would be t_o =\pm 1.895

Part b

P(t>t_o) =0.05

For this case we can use the complement rule and we got:

1-P(t_7

We can solve for the probability and we got:

P(t_7

And we can use the following excel code to find the value"=T.INV(0.95;7)"

And the answer would be t_o = 1.895

5 0
3 years ago
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