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GarryVolchara [31]
3 years ago
8

the grades recieved by 300students follow a normal distribution. the mean of the grades is 75% and the standard deviation is 8%.

A. how many students recieved a grade greater than 75%? B. how many students recieved a grade higher than 91%?
Mathematics
1 answer:
tiny-mole [99]3 years ago
3 0

Answer:

Correct answers ended up being 6.7% for an A.       100- 93.32= 6.68 round one place 6.7 %

For B it's    93.32 - 69.1463 = 24.17  round one place so   24.2%

Step-by-step explanation:

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Nothing sorry.......
Varvara68 [4.7K]

Answer:

ok

Step-by-step explanation:

well thats good

6 0
2 years ago
How to change decimal to a fraction
Ksju [112]
Put the number that the decimal is over the place that it is in
example
.5
every space after the decimal is multiplied by 10
tenths place 0.1
hundreths 0.01
thousanths 0.001
etc
so .5 is in the tenths place so the fraction would be 5/10
the decimal is now converted into a fraction

another example
.07 is in the hundreths so it would be 7/100

final example
.25 is in the hundredths place since the last number lands on the hundreths column
it would be 25/100

if possible you can simplify if that is what is needed
3 0
3 years ago
A plane is traveling at 600 miles per hour. How many feet per second is it traveling?
Whitepunk [10]

Answer:

see explanation

Step-by-step explanation:

First we need to convert 600 miles per hour into feet per hour,

which is

# 3.168e+6

next, divide both by 60 to get feet per minute, then divide by 60 again on both sides to get feet per second

which is

#880 ft per second

8 0
3 years ago
By what number would you multiply to solve 4/5 t = 36
mihalych1998 [28]

Answer:

45

Step-by-step explanation:

4/5 t = 36

Divide both sides by 4/5

4/5 / 4/5 t = 36/4/5

4/5 cancels 4/5

Also flip the divisor 4/5

t = 36x5 / 4

= 180/4

= 45

3 0
2 years ago
10.<br> 25<br> xº<br> 40<br> Solve for x. Round to the nearest tenth
xxTIMURxx [149]

Answer:

51.32

Step-by-step explanation:

∠B = arcsin(b·sin(A)a)

= 0.67513 rad = 38.682° = 38°40'56"

∠C = 180° - A - B = 0.89566 rad = 51.318° = 51°19'4"

c = a·sin(C)sin(A) = 31.22499

3 0
2 years ago
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