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andrew11 [14]
2 years ago
7

Salaries for teachers in a particular elementary school district are normally distributed with a mean of $49,000 and a standard

deviation of $4,500. We randomly survey ten teachers from that district. (Round your answers to the nearest dollar.)
(a) Find the 90th percentile for an individual teacher's salary.
$


(b) Find the 90th percentile for the average teacher's salary.
Mathematics
1 answer:
Dmitry_Shevchenko [17]2 years ago
4 0

Answer:

they get a lot of moohlah

Step-by-step explanation:

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Nine less than a number is 9. Find the number.
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I'm guessing it is 18. 18 decreased by nine equals nine so to me it makes sense.
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Total bill for repairs is 329.00
sergij07 [2.7K]

Answer:

3 hours was spent on labor

Step-by-step explanation:

<u>Key skills needed: Creating an equation, Solving an equation</u>

1) The total cost is 329.00 (or 329). The parts are 125.00 (or 125), and the labor is 68 per hour.

2) If we say h is the number of hours of labor, then we can create this equation --> 68h (or 68 multiplied by "h") 68h would be the cost of labor, and we need to find the number of hours (h) as a number.

3) We can create this equation --> 329 = 125 + 68h

--> This equation can be made as the total cost (329) is equal to the parts (125) and the labor (68h)

4) Subtract 125 from both sides to get 68h by itself

--> 329 - 125 = 204 so 204 = 68h

--> Divide by 68 on both sides (204 divided by 68 is 3)

--> This means that h is 3.

Therefore, the number of hours spent on labor is 3.

<em>Hope you understood and have a nice day!! :D</em>

5 0
2 years ago
Pls answer these 2 questions show your work
salantis [7]
Multiply 64% (0.64) x 75 =48 tiles
Multiply 85% (0.85) x 40 = 34 emails
4 0
3 years ago
I need help with this can some one help me
Ymorist [56]

Answer:

216

Step-by-step explanation:

We know that the two angles must add up to 180

so

108+x/3=180

solve for x

72=x/3

x=216

3 0
3 years ago
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