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serious [3.7K]
3 years ago
12

Kaitlyn works mowing laws and babysitting. She earns $7.90 an hour for mowing and $6.80 an hour for babysitting. How much will s

he earn for seven hours 7 hours of mowing and one hour babysitting
Mathematics
1 answer:
Alona [7]3 years ago
4 0
7.90×7=55.30. 6.80×1=6.80. 55.30 + 6.80=62.10 Total
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What’s the right answer?
galina1969 [7]

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I am unable to read all of the options in the picture you provided but I hope this helps! (:

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3 years ago
Read 2 more answers
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maria [59]

Answer: (15.47, 24.53)

Step-by-step explanation:

We know that the confidence interval for population mean is given by :_

\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}

, where n= sample size.

\sigma = standard deviation.

\overline{x}= sample mean.

z*= Critical value.

Given : n= 450

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\sigma=49

Critical value for 95% confidence = z*=1.96     [From z-value table]

Then, the 95% confidence interval will be :-

20\pm (1.96)\dfrac{49}{\sqrt{450}}

\approx 20\pm (1.96)(2.31)

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Hence, the 95% confidence interval for the mean change in score μ μ in the population of all high school seniors. : (15.47, 24.53)

3 0
3 years ago
Probability is a measure of how likely an event is to occur. write the probability of the following statements:
attashe74 [19]

Step-by-step explanation:

This is a probability related question, let the event be E

We know that the likelihood of an event happening is given as

Pr(E)=1

if an event will not occur the probability is

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Pr(E)=0<E>0.5

c.This event is extremely unlikely, but it will occur once in a while in a long sequence of trials:

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d.This event will occur for sure: Pr(E)=0

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NNADVOKAT [17]

Given data:

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m=(d-b)/(c-a)

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8 0
1 year ago
The volume n divided by ten is one hundred
Lesechka [4]
1000 because 100 divide my 10 is 10 so just add a zero
4 0
3 years ago
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