3 years ago

A 30°–60°–90° triangle has a shorter leg with a length of 3 units.

1 answer:

3 0

The hypotenuse is 6. 30-60-90 triangles have a ration of x, x $\sqrt{3}$ , and 2x, respectively. So since you have the value for the 30º side, then you just double it to get the hypotenuse's value.

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4 years ago

At a local restaurant, the amount of time that customers have to wait for their food is normally distributed with a mean of 18 m

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99.7% of customers have to wait between 8 minutes to 30 minutes for their food.

Step-by-step explanation:

We are given the following in the question:

Mean, μ = 18 minutes

Standard Deviation, σ = 4 minutes

We are given that the distribution of amount of time is a bell shaped distribution that is a normal distribution.

Empirical Formula:

Almost all the data lies within three standard deviation from the mean for a normally distributed data.
About 68% of data lies within one standard deviation from the mean.
About 95% of data lies within two standard deviations of the mean.
About 99.7% of data lies within three standard deviation of the mean.

Thus, 99.7% of the customers have to wait:

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