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torisob [31]
3 years ago
10

Please I need help it’s due tomorrow and I don’t understand I need help on 1-10

Mathematics
1 answer:
aivan3 [116]3 years ago
4 0

for all of them calcuate whats in the prenteces first then use those numbers to  solve the rest of the problem



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foot locker uses sales per square foot as a measure of store productivity last year the mean annual sales per square foot was 39
lord [1]

Answer:

There is a 82% probability that th esample mean annual sales per square foot is at least $384.

Step-by-step explanation:

We have a population with mean 390 and standard deviation 45.83.

Samples of size n=49 are taken.

The parameters of the sampling distribution are:

\mu_s=\mu=390\\\\ \sigma_s=\dfrac{\sigma}{\sqrt{n}}=\dfrac{45.83}{\sqrt{49}}=\dfrac{45.83}{7}=6.547

First, we have to calculate the z-score that satisfies:

P(z>z^*)=0.82

This z-score, looked up in a standard normal distribution table, is z=-0.915.

Then, we can calculate the sample mean as:

M=\mu_s+z\cdot\sigma_s=390+(-0.915)\cdot 6.547=390-6=384

There is a 82% probability that th esample mean annual sales per square foot is at least $384.

3 0
3 years ago
P and Q are points on the line 3y - 4x = 12
Lorico [155]

Answer:

Step-by-step explanation:

Since the coordinates of P are (0, 1), this makes P the y-intercept of that line. The y-intercept exists where x = 0. And in the coordinate (0, 1), x does in fact equal 0.

Since the one coordinate given in Q is (?, 0), this means that Q is the x-intercept of the line. The x-intercept exists where y = 0. And in the coordinate (?, 0), y does in fact equal 0. So in order to solve for the x coordinate of Q, we plug in a 0 for y and solve for x:

3(0) - 4x = 12 and

-4x = 12 so

x = -3

6 0
3 years ago
Raul is paid $586.32 biweekly. What is his yearly salary?
ludmilkaskok [199]
DUDE yo what is up he is paid 45.12
8 0
4 years ago
Read 2 more answers
At the beginning of the school year, Jayden's mother put $80 in his cafeteria account. Each time Jayden orders lunch, it deducts
Gnoma [55]

Answer:

y = 80 - 2.75n

Step-by-step explanation:

Given

Beginning = 80

Rate = 2.75

Required

Model the situation using an equation

Represent the number of orders with n

Represent the balance with y

y is calculated as:

y = Beginning - Rate * n

We used minus because the amount is being deducted

y = 80 - 2.75* n

y = 80 - 2.75n

5 0
3 years ago
select the correct percent increase for a price that is double the original amount for example a book that originally cost $30 n
nexus9112 [7]
I think the answer would be one half 

8 0
3 years ago
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