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exis [7]
2 years ago
8

A business owner would like to know if the new marketing strategy improves their sales. They recorded their average income befor

e and after they change their strategy. Before, they have an average income per month of $ 100,098 with a standard deviation of $ 64, 090. Now, they computed their monthly average of $ 102,190 with a standard deviation of $ 55, 976.Use n= 30 and Test the claim that there is a significant increase of their income due to their new marketing strategy using 0.05 level of significance.
Mathematics
1 answer:
Savatey [412]2 years ago
7 0
The answer is 220.214 is the correct answer because you see the the income and if you add that up that’s the how much level will come up
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The hypotenuse of a right triangle is 13cm long. the longer leg is 7 cm longer than the shorter leg. find the side lengths of th
Ad libitum [116K]

5^2 + 12^2 = 13^2


is the second or third Pythagorean triple on the list, which gives us the answer directly.


But if we didn't know that, let x be the short leg:


x^2 + (x+7)^2 = 13^2


2x^2 + 14 x + 49 - 169 = 0


x^2 + 7x  - 60 = 0


(x+12)(x-5)=0


Rejecting the negative root, x=5, other side 12, the Pythagorean triple we found.

8 0
3 years ago
Joe brought g gasoline for 2.75 per gallon and c cans of oil for 3.35 per can.
KatRina [158]

Answer:

Step-by-step explanation:

Let T represent the total amount spent.

The word and implies addition so the equation would be T= 2.75g+3.35c .

Now plug in the g and c values given in part b

So T= 2.75(5.8)+3.35(6)

Next simplify the expression

This is what T or the total Spent equals

3 0
3 years ago
What 2 square numbers have a difference of 55
Mrrafil [7]
a^2-b^2 =55 \\  \\ 28^2 -27^2=55 \\  \\ 28^2 =784 \\  \\27^2 =729 \\  \\ 784-729=55 \\  \\  \\ \sf So,~the~ difference~ of~ the~ two~ squares~ of~ 28~ and~ 27~ equals~ to~ 55.
5 0
3 years ago
Find the volume of a cylinder with a diameter of 8 inches and a height that is 3 times the radius. Use 3.14 for pi round answer
masha68 [24]

Answer:

603.19

Step-by-step explanation:

v=πr^{2} h

pi is 3.14

Radius= Diameter/2= 4, so r square= 16

Height= Radius*3=12

So volume= 3.14*16*12=603.19

6 0
3 years ago
In △ABC, m∠A=16°, m∠B=49°, and a=4. Find c to the nearest tenth.
xenn [34]

Answer:

= 8.33 inches

Step-by-step Explanation

First add 49 + 16, which equals 65, and subtract that result from 180, since a triangle equals 180 degrees and you find out angle C is equal to 115 degrees.

Now using the formula sinA/a = sinB/b = sinC/c, plug in values and you'd get the equation sin49 x 10/sin115. After solving the equation you'd get about  8.32729886047258 inches.

= 8.33

7 0
3 years ago
Read 2 more answers
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