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:

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

This z-score, looked up in a standard normal distribution table, is z=-0.915.
Then, we can calculate the sample mean as:

There is a 82% probability that th esample mean annual sales per square foot is at least $384.
<span> y^2 = (3x + 1)^3 / 9x + 2
2*y*(dy/dx)=(9</span>(3x + 1)^2*(9x + 2) -((9*(3x + 1)^3))/ ((9x + 2)^2)
(dy/dx)=(9(3x + 1)^2*(9x + 2) -((9*(3x + 1)^3))/ (2*y*(9x + 2)^2)
(dy/dx)=(9(3x + 1)^2*(6x + 1))/ (2*y*(9x + 2)^2)
answer
A
A) 45 mins
each big square represents 15 mins
b) 100km/h
speed= distance/time so it would be 50km/0.5h= 100km/h
Hope this helps! :)
Absolute value is always positive so I would say the answer would be A.
The formula of the perimeter of a rectangle is equal to:
Perimeter = 2L + 2W
Forming the equation.
<span>Perimeter = 2L + 2W
</span>17.6 = 2L + 2W
Getting the lengths.
<span>17.6 = 2L + 2W
</span>2L = 17.6 - 2W
L = (17.6 - 2W) / 2
<span>17.6 = 2L + 2W
</span>2W = 17.6 - 2L
<span>W = (17.6 - 2L) / 2</span>