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3 years ago

15

Solve the problem. The scores on a certain test are normally distributed with a mean score of 43 and a standard deviation of 3.

What is the probability that a sample of 90 students will have a mean score of at least 43.3162? 0.8413 0.3174 0.1587 0.3413

1 answer:

Natali [406]3 years ago

8 0

Answer is C. Hope this helps. Rate and thanks and brainliest answer would be nice. -<span>Haяяison</span>

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Solve for X<br><br> 8^3x-10 =4^6x-27<br><br> Thanks in advance!

dlinn [17]

$8^{3x-10}=4^{6x-27}\\\\(2^3)^{3x-10}=(2^2)^{6x-27}\qquad\text{use}\ (a^n)^m=a^{nm}\\\\2^{3(3x-10)}=2^{2(6x-27)}\qquad\text{use distributive property}\\\\2^{(3)(3x)+(3)(-10)}=2^{(2)(6x)+(2)(-27)}\\\\2^{9x-30}=2^{12x-54}\iff9x-30=12x-54\qquad\text{add 30 to both sides}\\\\9x=12x-24\qquad\text{subtract 12x from both sides}\\\\-3x=-24\qquad\text{divide both sides by (-3)}\\\\\boxed{x=8}$

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4 years ago

The perpendicular line of x-6y=2, (2, 4) in slope intercept form

pentagon [3]

The perpendicular line to x-6y=2, and passing through (2, 4) is y=-6x+16

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3 years ago

What is the balance on a deposit of $1,150 that earns 9% interest compounded annually for 2 years

igor_vitrenko [27]

Step One: Calculate interest.

$1150*0.09=103.5$

Step Two: Calculate the amount at the end of the first year.

$1150+103.5=1253.5$

Step Three: Calculate the amount at the end of the second year. This will be your final answer.

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3 years ago

36 = 3х<br> I need help

Lisa [10]

Answer:

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Step-by-step explanation:

just divide 36 by 3 which is 12

$\frac{36}{3} = 12$

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3 years ago

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seropon [69]

Answer:

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Step-by-step explanation:

Divide the 75 points by the five days to find the average points lost per day.

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3 years ago

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