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lys-0071 [83]
2 years ago
9

Find tan please.make sure to simplify if needed

Mathematics
1 answer:
Alina [70]2 years ago
7 0
What do u want me to solve there is no photo
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how many weeks of data must be randomly sampled to estimate the mean weekly sales of a new line of athletic footwear? We want 98
Ber [7]

Answer:

We need to sample at least 37 weeks of data.

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{1-0.98}{2} = 0.01

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.01 = 0.99, so z = 2.327

Now, find the margin of error M as such

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

We want 98% confidence that the sample mean is within $500 of the population mean, and the population standard deviation is known to be $1300

This is at least n weeks, in which n is found when M = 500, \sigma = 1300

So

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

500 = 2.327*\frac{1300}{\sqrt{n}}

500\sqrt{n} = 2.327*1300

\sqrt{n} = \frac{2.327*1300}{500}

(\sqrt{n})^{2} = (\frac{2.327*1300}{500})^{2}

n = 36.6

Rounding up

We need to sample at least 37 weeks of data.

8 0
3 years ago
Idk this bs its stupid.?!
LekaFEV [45]

Answer:y=-3/2x-1

Step-by-step explanation:-3/2 is your slope which is your m and -1 is your b x is left alone.

7 0
3 years ago
Read 2 more answers
PLS HELP GUYS PLSSSS !!!!
solong [7]

Answer:

Step-by-step explanation:

18/12 = 24/(x-2) Put the similar sides in the propertions.

5 0
2 years ago
Answer ASAP please!
lara31 [8.8K]

Answer:

D

Step-by-step explanation:

A. Sin 42=0.669

Cos=52=0.617

B. Sin 90=1

cos 90=0

C. cos30=0.866

sin 70=0.940

D. sin80=0.985

cos 10=0.985

3 0
3 years ago
Evaluate 11011-101 base 2
choli [55]

11011 - 101 = 10110 (putting the zero in front does not matter)

Base two only accommodate 1's and 0's. Base two are called binary.

Check the picture below

Note 10 - 1 in binary equals 1

when we borrow to 1, that zero becomes 10, then 10 minus 1 equals 1.

For similar question check the link : brainly.com/question/17099589?referrer=searchResults

7 0
2 years ago
Read 2 more answers
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