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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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This means that it's 12 times f, then add that by 24. This f is a variable. It could be any number. First, try to find out what f equals. Then use that to find the answer.
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In which quadrant is the number 6 – 8i located on the complex plane?
Bogdan [553]

Answer:

4th quadrant

Step-by-step explanation:

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3 years ago
Solve the equation, and check the solutions √(x+9)/4=3.
nadya68 [22]

Answer:

Solution: x = 135

Step-by-step explanation:

Hi there!

First, let´s write the equation:

√(x + 9) /4 = 3

Multiply by 4 both sides of the equation

√(x + 9) = 12

square both sides of the equation

x + 9 = 144

subtract 9 to both sides of the equation

x = 135  

Let´s check the solution:

√(x + 9) /4 = 3

x = 135

√(135 + 9) /4 = 3

√(144) /4 = 3

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3 = 3

Then, x = 135 is the solution to the equation.

Have a nice day!

8 0
3 years ago
DUE IN 2 MINTUES PLZZ HELP
dusya [7]

Answer:

320

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3 years ago
A worker uses 450 inches of steel wire to make 300 springs of the same size. At this
rusak2 [61]

Answer: 1.5 inches of steel for one spring

Step-by-step explanation:  

I divided 450 by 300 which gets you to 1.5 next to check your answer you multiply that by 300 which gets you to 450

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3 years ago
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