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3 years ago

A person with a full time job works approximately how many hours a year

2 answers:

7 0

Typical full time workers work for about 40 hours a weak each year

Which means 40 hours a week for 52 weeks

40 × 52 = 2080 hours in one year

Anna71 [15]3 years ago

6 0

<span>
If they work 8 hours a day for 5-7 days that is about 40-56 hours ,weekly 160-224 monthly, yearly 1920-2688</span>

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Mickey is solving a problem. What are some steps he might take after reaching his solution?

Leokris [45]

My guess would be A and D

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3 years ago

4×____×1=12 ?=____. please help me solve this question

Triss [41]

Answer:

4 x 3 x 1 = 12

12 = 12

Step-by-step explanation:

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8 0

3 years ago

How many women must be randomly selected to estimate the mean weight of women in one age group? We want 90% confidence that the

ki77a [65]

Answer:

155 women must be randomly selected.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.9}{2} = 0.05$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.05 = 0.95$ , so Z = 1.645.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

The population standard deviation is known to be 28 lbs.

This means that $\sigma = 28$

We want 90% confidence that the sample mean is within 3.7 lbs of the populations mean. How many women must be sampled?

This is n for which M = 3.7. So

$M = z\frac{\sigma}{\sqrt{n}}$

$3.7 = 1.645\frac{28}{\sqrt{n}}$

$3.7\sqrt{n} = 1.645*28$

$\sqrt{n} = \frac{1.645*28}{3.7}$

$(\sqrt{n})^2 = (\frac{1.645*28}{3.7})^2$

$n = 154.97$

Rounding up:

155 women must be randomly selected.

4 0

3 years ago

Please help with this

ss7ja [257]

Answer:

The tank has a capacity of 6000 liters

2.75 cubic meters of concrete

Step-by-step explanation:

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3 years ago

There are 132 counters in a bag. The ratio of green counters to purple

DedPeter [7]

9514 1404 393

Answer:

77 purple counters

Step-by-step explanation:

There are a total of 5+7=12 ratio units, so each stands for 132/12 = 11 counters. The 7 ratio units representing the purple counters stand for ...

11 × 7 = 77 purple counters

4 0

2 years ago