The top of a loading ramp is 5 feet off the ground. The ramp rises at a 30° angle. To the

Mathematics

1 answer:

Scorpion4ik [409]3 years ago

7 0

Answer:

5/sin30⁰

the distance is 10feet

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What is the sum of 7x/ x^2 - 4 and 2 / x + 2?

Mrac [35]

7*x/x^2-4+2/x+2

4 0

2 years ago

A normal distribution has a mean of 137 and a standard deviation of 7. Find the z-score for a data value of 121. Incorrect Round

Neko [114]

Answer:

The z-score for a data value of 121 is -2.29.

Step-by-step explanation:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 137, \sigma = 7$