Help please I need the correct answer

Mathematics

1 answer:

patriot [66]4 years ago

3 0

Answer:

Do it on standard form

Step-by-step explanation:

Doing it by standard form ensures simplifying

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A piano has 88 keys. Fifty-two of the keys are white.

Tcecarenko [31]

Answer:

Step-by-step explanation:

88 - 52

=36

8 0

3 years ago

The height of a ball above the ground in feet is defined by the function h(t) = -16t Squared + 80t +3, where t is the number of

jasenka [17]

Plug in 2 for t.
=> -16*(2^2) +80*2 +3
=> -16*4 +160 +3
=> -64+163
=> 99

6 0

3 years ago

8.52 The heights of 2-year-old children are normally distributed with a mean of 32 inches and a standard deviation of 1.5 inches

sweet [91]

Answer:

Heights of 29.5 and below could be a problem.

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

The heights of 2-year-old children are normally distributed with a mean of 32 inches and a standard deviation of 1.5 inches.

This means that $\mu = 32, \sigma = 1.5$