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Stells [14]
3 years ago
15

A baseball player swings at the ball 56 times over a season and hits 16 times.

Mathematics
1 answer:
olasank [31]3 years ago
4 0

Answer:

2:5.

Step-by-step explanation:

Number of misses = 56 - 16 = 40.

Ratio = 16:40

- which simplifies to   (16/8) : (40 / 8)

= 2:5.

You might be interested in
An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed, with mean equ
kompoz [17]

Answer:

0.62% probability that a random sample of 16 bulbs will have an average life of less than 775 hours.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a large sample size can be approximated to a normal distribution with mean \mu and standard deviation \frac{\sigma}{\sqrt{n}}

Normal probability distribution.

Problems of normally distributed samples can be solved using the z-score formula.

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 = 800, \sigma = 40, n = 16, s = \frac{40}{\sqrt{16}} = 10

Find the probability that a random sample of 16 bulbs will have an average life of less than 775 hours.

This probability is the pvalue of Z when X = 775. So

Z = \frac{X - \mu}{s}

Z = \frac{775 - 800}{10}

Z = -2.5

Z = -2.5 has a pvalue of 0.0062. So there is a 0.62% probability that a random sample of 16 bulbs will have an average life of less than 775 hours.

5 0
3 years ago
X=10 <br> 3x+5y=20 <br> in the system of equations, what is the value of y
vova2212 [387]
3(10) + 5y = 20
5y = 20 - 30
5y = - 10
y = - 2
6 0
3 years ago
Read 2 more answers
The tire of his unicycle has a circumference of 2.8m , point,, and the tire revolves 1.51.51, point, 5 times per second. What is
I am Lyosha [343]

Answer:

Benjamin travels 7 meters in 100 seconds.    

Step-by-step explanation:

We are given the following in the question:

Circumference of tire = 2.8 m

Revolution of time = 1.5 times per minute.

Total time = 100 seconds.

We have to calculate distance covered by Benjamin.

Total number of revolution of tires =

=\text{Revolution rate}\times \text{Time}\\\\=1.5\text{ revolution per minute}\times \dfrac{100}{60}\text{ minutes}\\\\=2.5 \text{ revolutions}

Total distance covered by Benjamin =

=\text{Number of revolution of tires}\times \text{Circumference of tire}\\=2.5\times 2.8\\=7\text{ meters}

Thus, Benjamin travels 7 meters in 100 seconds.

8 0
3 years ago
If n and m are integers and n2+m2 is even, which of the following is impossible?
boyakko [2]


None of 

 these imposible hope this helps :)

6 0
3 years ago
Use complete sentences to describe why for any set B, that the empty set would be a subset of it.
ella [17]
Because empty set has no element which automatically make it a subset of every set. 

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
6 0
3 years ago
Read 2 more answers
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