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4vir4ik [10]
3 years ago
5

Amara can proofread 12 pages in 6 minutes. how many minutes will it take her to proofread 96 pages?

Mathematics
1 answer:
il63 [147K]3 years ago
6 0
<span>12 pages in 6 minutes
12/6 = 2 so 2 pages per minute
if 96 pages then 96 / 2 = 48 minutes

answer
</span><span>it will take her  48 minutes to proofread 96 pages

</span>
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Which function has the range (-∞, 0) and a range of (2, ∞)?
kirill [66]

Answer:

y=sec(x) + 1

Step-by-step explanation:

The Sec(x) = 1/Cos(x) which has a minimum of +1 when positive, and -1 when negative.  Adding +1 to it gives a range of (-∞,0) and when negative (2,∞)

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3 years ago
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Given a line segment that contains the points A,B, &amp; C in order, if AB = x + 12, and BC = 2x - 4, and AC = 26, find x.
Troyanec [42]

Answer:

x = 6

Step-by-step explanation:

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2 years ago
Consider the following hypothesis test.H0:μ1−μ2=0 Ha:μ1−μ2≠0The following results are for two independent samples taken from the
Julli [10]

Answer:

a) z =\frac{104-106}{\sqrt{\frac{8.4^2}{80} +\frac{7.6^2}{70}}}= -1.53  

b) p_v =2*P(z

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Step-by-step explanation:

Information given

\bar X_{1}= 104 represent the mean for 1

\bar X_{2}= 106 represent the mean for 2

\sigma_{1}= 8.4 represent the population standard deviation for 1

\sigma_{2}= 7.6 represent the population standard deviation for 2

n_{1}=80 sample size for the group 1

n_{2}=70 sample size for the group 2

z would represent the statistic

Hypothesis to test

We want to check if the two means for this case are equal or not, the system of hypothesis would be:

H0:\mu_{1}=\mu_{2}

H1:\mu_{1} \neq \mu_{2}

The statistic would be given by:

z =\frac{\bar X_1-\bar X_2}{\sqrt{\frac{\sigma^2_1^2}{n_1} +\frac{\sigma^2_2^2}{n_2}}}=(1)

Part a

Replacing we got:

z =\frac{104-106}{\sqrt{\frac{8.4^2}{80} +\frac{7.6^2}{70}}}= -1.53

Part b

The p value would be given by this probability:

p_v =2*P(z

Part c

Since the p value is higher than the significance level provided we have enogh evidence to FAIL to reject the null hypothesis and we can't conclude that the true means are different at 5% of significance

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Okay!

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