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cluponka [151]
2 years ago
8

Tom swam to the bottom of a swimming pool that was 9 feet deep and he touched the

Mathematics
1 answer:
zmey [24]2 years ago
7 0

Answer:

18 I guess if he can swim straightdown and straight  up :-)

Step-by-step explanation:

9+9=18

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Answer:

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In a national survey of 1987 adults, 1570 responded that lack of respect and courtesy in American society is a serious problem,
Alik [6]
<h2>Answer with explanation:</h2>

As per given , we  have

H_0: p\leq\dfrac{3}{4}\\\\H_a: p>\dfrac{3}{4}

Since , alternative hypothesis is right tailed, so the test is a right tailed test.

n= 1987

Proportion of adults believe that rudeness is a worsening problem : p=\dfrac{1257}{1987}\approx 0.6326

Test statistic : z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}

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(since , the normal curve takes values of z from -7 to 7, so we use critical value to draw conclusion.)

The critical value for a significance level of 0.005= 1.645

Since , absolute test statistic value (12.09) is greater than the critical value (1.645), it means there is statistical significance and so we reject the null hypothesis.

3 0
3 years ago
Find the slope of the line that passes through the points (10, -2) and (10,-6)
defon
-6+2
--------- =
10-10
-4
---- =
0
m=0
*(the "-----" are supposed to be fractions, sorry if that looks confusing)*

y+2=0(x-10)
y+2=0
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Your answer would be "y=-2."
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