Please please please help me on this i'll give 14 points to whoever answers

Mathematics

1 answer:

Alexus [3.1K]2 years ago

4 0

Bro the answer is 600cm2
75% sure

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9. What is the likelihood that a randomly selected couple's relationship survived between 90 and 150 days

andrew-mc [135]

Answer:

0.5818

Step-by-step explanation:

Suppose the average teenage romantic relationship is normally distributed with a mean number of 100 days with a standard deviation of 30 days.

Answer:

The z score is used to determine how many standard deviations that the raw score is above or below the mean. If the z score is positive then the raw score is above the mean and if it is negative then it is below the mean. It is given by:

$z=\frac{x-\mu}{\sigma}\\ \\where\ \mu=mean,\sigma=standard\ deviation, x=raw\ score$

Given that:

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Therefore, from the normal distribution table, P(90 < x < 150) = P(-0.33 < z < 1.67) = P(z < 1.67) - P(z < -0.33) = 0.9525 - 0.3707 = 0.5818

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2 years ago

Please answer need to turn it in please help me answer

Elena-2011 [213]

Answer: Sir in what way would you like me to explain this

Step-by-step explanation:

4 0

4 months ago

Solve in one variable<br> 2/3x + 5 = 3/2x

Montano1993 [528]

First, we group together the terms with variables in one side by subtracting 3/2 x and 5 from both sides of the equation.
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2 years ago