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NeX [460]
2 years ago
8

[7/8]2 evaluate in simplest form as a fraction

Mathematics
1 answer:
Ksivusya [100]2 years ago
7 0

SOLUTION:

=) 49/64 is the answer I think

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A survey of 1 comma 558 randomly selected adults showed that 522 of them have heard of a new electronic reader. The accompanying
sineoko [7]

Answer with explanation:

Let  p be the proportion of adults have heard of the new electronic reader.

Given claim : The accompanying technology display results from a test of the claim that 38​% of adults have heard of the new electronic reader.

i.e. p=0.38

Then , the set of hypothesis will be :-

H_0: p=0.38\\\\H_a:p\neq0.38

Since, the alternative hypothesis is two tailed , so the test is two-tailed test.

Also, it is given that the sample size : n=1558

Number of adults showed that they have heard of a new electronic reader=522

So the sample proportion for adults have heard of the new electronic reader : \hat{p}=\dfrac{522}{1558}\approx0.34



The test statistic for proportion is given by :-

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\\\\\\\Rightarrow\ z=\dfrac{0.34-0.38}{\sqrt{\dfrac{0.38(1-0.38)}{1558}}}\\\\\\\Rightarrow\ z=-3.25279036541\approx-3.25

By using standard normal distribution table , the P-value for two tailed test corresponds to the obtained z-value ==0.0011541

6 0
3 years ago
A line has a slope of 9. One of the points on the line is (-2, p). Another point on the line is (2, 2p+1). Determine the value o
igomit [66]

As we travel from (-2, p) to (2, 2p+1), x increases by 4 and y increases by p+1.  Note that -2 + 4 = 2 (which is correct), and that p + (p+1) = 2p+1 (which is also correct).                                                        

                                                                           p+1

Thus, the slope of this line is m = rise / run = -------- = 9

                                                                               4


Then p + 1 = 36, and p = 35.

8 0
3 years ago
Which is bigger 12.5% or 3/20
GaryK [48]
3/20 is 15% so that's bigger
4 0
3 years ago
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A rectangular photo frame covers an area of 20 square inches on a wall. The width of the frame is 1 inch less than its length. F
Salsk061 [2.6K]
You need to find two factors of 20 that are consecutive: 4,5.
Answer: 5inx4in
7 0
3 years ago
Convert the angle 0=17pie/18 radians to degrees.<br> Express your answer exactly.
Anettt [7]
170° is the answer I got hope it helps
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2 years ago
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