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matrenka [14]
3 years ago
9

Scores on an exam are normally distributed with a mean of 67.5 and a standard deviation of 10. Find the percent of the scores th

at satisfy each question.
a)Less than 32


b)At least 70


c)Between 56 and 66
Mathematics
1 answer:
lozanna [386]3 years ago
6 0

Answer:

C

Step-by-step explanation:

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What is an equation of the line that passes through the point (6,0) and is perpendicular to the line 3x+4y=20
My name is Ann [436]

Answer:

The equation of the line is y = 4/3x - 8

Step-by-step explanation:

In order to find this, we first have to find the slope of the original line. We do this by solving for y.

3x + 4y = 20

4y = -3x + 20

y = -3/4x + 5

Now that we have the slope of -3/4 we can find the perpendicular slope. The perpendicular slope of any time is the opposite and reciprocal slope. So we flip -3/4 to get -4/3 and then we make it positive (4/3). Now that we have our new slope, we can input it along with the point into point-slope form to find the equation.

y - y1 = m(x - x1)

y - 0 = 4/3(x - 6)

y = 4/3x - 8

7 0
3 years ago
9 • (7 – 4)2 + 9 simplify asap
a_sh-v [17]

Answer:

90

Step-by-step explanation:

9 x (3)2 + 9 first do the parenthesis

9 x 9 + 9 I am assuming the 2 was an exponent

81+9

90

5 0
2 years ago
a bowl contains 4 peaches and 4 apricots. Maine randomly selects one, puts it back, and randomly selects another. what is the pr
almond37 [142]
1/4 or 25% because...

The probability that Maine picks an apricot is 4/8

The probability that Maine picks an apricot after putting the first apricot back is still 4/8

4/8 x 4/8 = 16/64 = 1/4
4 0
2 years ago
A dog is leashed to the corner of a house. How much running area does the dog have? Round your answer to the nearest square foot
svet-max [94.6K]

Answer: 942 ft

Step-by-step explanation: I hope this helps!

4 0
3 years ago
What is it? Eighty-six divided by six??
bixtya [17]
The answer is 14.33333 but you will have to round which you will just have 14.3
6 0
3 years ago
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