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Mashutka [201]
3 years ago
8

(2/3v)^-3 for v=9 I don't understand how to find the answer. will you help me?

Mathematics
1 answer:
natta225 [31]3 years ago
8 0

V=square root (3/2)/2
Or V=-square root (3/2)/2

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18
Cloud [144]

Answer: 100

5

Step-by-step explanation:

a) The mean of a normal distribution is also the median. Half the population will have values above the mean. Half of 200 is 100, so ...

... 100 students will have grades above 70%.

b) 84% is 14% above the mean. Each 7% is 1 standard deviation, so 14% is 2 standard deviations above the mean. The empirical rule tells you 95% of the population is within 2 standard deviations of the mean, so about 5% of students (10 students) got grades higher than 84% or lower than 56%. The normal distribution is symmetrical, so we expect about 5 students in each range.

... about 5 students will have grades above 84%.

3 0
3 years ago
The angle measurements in the diagram are represented by the following expressions.
Rina8888 [55]

Answer:

since those 2 lines are parrelel that means the angles are the same so

8x+6=4x+38

minus 6

8x=4x+32

minus 4x

4x=32

divide by 4

x=8

Hope This Helps!!!

7 0
1 year ago
Read 2 more answers
Show your work. Round to the nearest cent when necessary.
hjlf

Answer:

Option A

Step-by-step explanation:

Bag A: 30 cents per bag

Bag B: 31 cents per bag

In order to find Cents per bag divide the number of bags from the amount it costs.

Bag A: 6 ÷ 20 = 0.30

Bag B: 9.92 ÷ 32 = 0.31

3 0
2 years ago
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The heights of 20-year-old females are normally distributed with a mean of 64 inches and a standard deviation of 2 inches. What
natali 33 [55]

Answer: z= -1

Step-by-step explanation: z= (62-64)/2 = -1

5 0
3 years ago
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Solve the quadratic equation by completing the square. x^2-14x+42=0 First, choose the appropriate form and fill in the blanks wi
Tom [10]
X^2 - 14x + 42 = 0
x^2 - 14x = -42
x^2 - 14x + 49 = 49 - 42
(x - 7)^2 = 7
x - 7 = (+-) sqrt 7
x = 7 (+-) sqrt 7

solutions are : x = 7 + sqrt 7 and x = 7 - sqrt 7

5 0
3 years ago
Read 2 more answers
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