1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ede4ka [16]
4 years ago
11

An employee at a cell phone store makes $15 per hour plus a commission of 2.5% of her phone sales. This week she sold 40 phones

averaging $450 each. What is her commission this week?
Mathematics
1 answer:
blagie [28]4 years ago
3 0

Answer:

31 dollars so If you are a boy buy a

You might be interested in
The sales of a grocery store had an average of $8,000 per day. The store introduced several advertising campaigns in order to in
oksano4ka [1.4K]

Answer:

Null hypothesis:\mu \leq 8000  

Alternative hypothesis:\mu > 8000  

z=\frac{8300-8000}{\frac{1200}{\sqrt{64}}}=2  

p_v =P(Z>2)=0.0228  

Step-by-step explanation:

1) Data given and notation  

\bar X=8300 represent the sample mean  

\sigma=1200 represent the population standard deviation  

n=64 sample size  

\mu_o =800 represent the value that we want to test  

\alpha represent the significance level for the hypothesis test.  

z would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

2) State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean is higher than 8000, the system of hypothesis are :  

Null hypothesis:\mu \leq 8000  

Alternative hypothesis:\mu > 8000  

Since we know the population deviation, is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

3) Calculate the statistic  

We can replace in formula (1) the info given like this:  

z=\frac{8300-8000}{\frac{1200}{\sqrt{64}}}=2  

4) P-value  

Since is a one-side upper test the p value would given by:  

p_v =P(Z>2)=0.0228  

5) Conclusion  

If we compare the p value and the significance level assumed, for example \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the mean is significantly higher than $8000.  

4 0
3 years ago
Please answer !!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!
zvonat [6]

i would probably  use an iv or a blood simple

3 0
3 years ago
Try these calculations using the<br>graphing calculator:<br>31 x 42 -<br>443-637 -​
puteri [66]

Answer:

31 × 42 =  1,302

443 – 637 =  -194

Step-by-step explanation:

4 0
3 years ago
I dont understand
crimeas [40]
To determine the inverse of a function, we first write the parent function in terms of y. So, in this part the x would be isolated to one side of the equation. Then, with the new form of the parent function, we switch the x into y and y to x. The new function would be the inverse function. For the given function, we do as follows:

<span> y=-4/x + 1 
y - 1 = -4/x
x ( y - 1 ) = -4
x = -4 / (y -1)

Replacing x into y and y into x,

</span>y = -4 / (x -1)

<span>Therefore, the inverse is y=-a/x-b where a = 4 and b = 1.</span>
6 0
3 years ago
The quadrilateral shown is a parallelogram. If m∠ADC = 125° and m∠1 = 30°, what is m∠2? A) 15° B) 25° C) 35° D) 55°
Ganezh [65]

Answer:

B) 25°

Step-by-step explanation:

Assuming the quadrilateral is the one shown in the picture attached, then a triangle ADC is form, where m∠ADC = 125° and m∠1 = 30°. The addition of the three angles of a triangle is equal to 180°, so:

m∠ADC + m∠1 + m∠2 = 180°

Replacing with the known values and isolating m∠2 we get:

125° + 30° + m∠2 = 180°

m∠2 = 180° - 125° - 30°

m∠2 = 25°

3 0
3 years ago
Other questions:
  • Determine if the lines are parallel, perpendicular, or neither 10x+5y=-5 and y=-2x+6
    10·1 answer
  • Brad wants to open a new savings account. He finds one that returns 3% on his investment each year. Use the variable to write a
    12·2 answers
  • Evaluate 3 to the 2nd power + (6 - 2) x 4- 6 over 3
    9·1 answer
  • How many solutions -3x+9-2x=-12-5X
    5·1 answer
  • How many permutations of letter of the word APPLE are there?​
    5·1 answer
  • Find the surface area of a rectangular prism that has the following dimensions:
    14·2 answers
  • Please help! ASAP thank you
    12·1 answer
  • Which equation best represents the graph?
    10·1 answer
  • Simplify: <br> <img src="https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7B%5Cfrac%7Bx%5E2%7D%7B8y%5E%7B-1%7D%7D%20%7D" id="TexFormula1"
    8·2 answers
  • Which ordered pair is a solution of the equation?<br> y = 3x+5
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!