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ehidna [41]
3 years ago
6

The scores on a test given to all juniors in a school district are normally distributed with a mean of 72 and a standard deviati

on of 6. Find the probability that a randomly chosen junior has a score above 90. The probability of randomly choosing a junior whose score is above 90 is___%.
Mathematics
1 answer:
faust18 [17]3 years ago
8 0
30% is the correct  answer.
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7lbs. For 4 people unit rate is
ira [324]

Answer:

Step-by-step explanation:7 ÷4= 4 + 3 ÷ 4 = 30 ÷4 = 2.85

6 0
3 years ago
A woman standing on a hill sees a flagpole that she knows is 40 ft tall. the angle of depression to the bottom of the pole is 14
NemiM [27]
Let distance form the pole = x  and height of the hill = y ft

now we can set up 2 equayions 
tan 18 = (40-y)/x
tan 14 = y/x

from second equation y = sxtan14  so we have:-
 tan 18  = ( 40 - x tan 14) /  x

x tan 18 = 40 - x tan 14
x(tan 18 + tan 14) = 40

x   = 40 / (tan18 + tan 14)  =  69.66 feet Answer



6 0
3 years ago
The population of a city is expected to
Furkat [3]

\huge\boxed{1.0925p}

Since the population is going to increase by a certain percentage, we have to add 100\% to the percentage to keep the original population.

9.25\%+100\%=109.25\%

Now, convert the percentage into a decimal. You can do this by moving the decimal place two places to the left.

109.25\longrightarrow 1.0925

Now, just multiply that by p.

\large\boxed{1.0925p}

8 0
3 years ago
M= 1 1/2 going through (6,4) plug into y=mx=+b
Tema [17]
M = 1.5 = 3/2
y = mx + b
b = y - mx = 4 - (3/2)6 = 4 - 9 = -5
So equation of the line is:
y = 3x/2 - 5
3 0
3 years ago
A local health club has a large swimming pool non member must pay a 6$ per day fee to use the pool member of the club pay 1$ but
vazorg [7]

Answer:

50 days

Step-by-step explanation:

Step one:'

given data

Non member must pay a 6$ per day

let number of days be x

cost = 6x

member of the club pay 1$ but must pay a yearly membership fee of 250

cost = 250+x

Step two

equate the two expression to find x

6x=250+x

6x-x= 250

5x=250

divide both sides by 5

x= 250/5

x=50 days

3 0
2 years ago
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