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xz_007 [3.2K]
2 years ago
5

A set of mathematics exam scores are normally distributed with a mean of 80.280.280, point, 2 points and a standard deviation of

444 points. What proportion of exam scores are between 828282 and 85.685.685, point, 6 points? You may round your answer to four decimal places.
Mathematics
1 answer:
Ugo [173]2 years ago
5 0

Answer:

0.2379

lmk if im wrong :)

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Help me pls. I need help with the question
likoan [24]

Answer:

$173.90

Step-by-step explanation:

The most obvious way to answer this question is to multiply $9.40 by 18.5

This would result in 173.90.

But I realize nobody like to deal with decimals in a multiplication problem, so here's the way I would do it (<em>especially if you don't have a calculator!</em>)

The strategy is to break it down!

Multiply $9.40 x 18 hours to start, since this is easier.

9.4 x 18 = 169.2

So, that's $169.20 for 18 hours of work.

We aren't finished, because Abdel worked for 18.5 hours.

So, what half of $9.40?

9.4 / 2

= 4.7

-or-

$4.70

So, knowing that Abdel makes $4.70 in half an hour, lets just add that onto the $169.20 we got earlier.

169.2 + 4.7 = 173.9

-or-

$173.90 for 18.5 hours of work!

8 0
3 years ago
SCREENSHOT OF MY QUESTION:
drek231 [11]

Answer in fraction form = 9/8

Answer in decimal form = 1.125

note: the improper fraction 9/8 converts to the mixed number 1 & 1/8

To get this answer, we divide both sides by 8 to isolate n. The expression 8n really means "8 times n". We divide to undo the multiplication.

3 0
3 years ago
Use the formula P=21+2w to find the width of a rectangle when the length is 18cm and perimeter is 48 ..
KIM [24]

Answer:

w=6

Step-by-step explanation:

P=2(L)+2(w)

48= 2(18)+2w

48=36+2w

12=2w

w=6

checking;

48= 2(18)+2(6)

48= 36+12

48= 48

8 0
3 years ago
What is the diameter of a sphere? A.Twice the radius of the sphere B.The distance between two spheres C.The distance from the ce
dolphi86 [110]

Twice the raidus. okay, Im sure that how you spell Radius but anyway, Hope this helps.


3 0
3 years ago
1. What are the roots of the equation?
irinina [24]
The answers to the questions

5 0
3 years ago
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