Is someone able to help me with this please I don't understand.

Mathematics

1 answer:

gulaghasi [49]3 years ago

6 0

Answer:

Step-by-step explanation: if you pay attention to this answer its for points thanks

You might be interested in

A crew of highway workers paved 1/5 mile in 1/8

Dmitry_Shevchenko [17]

Answer: 2/5 Step-by-step explanation: The easiest approach is to realize that one hour is 3 times longer than 20 minutes. The longer the time, the more they will pave.

6 0

2 years ago

Samantha took an exam in her statistics class and received 90 out of 100. Samantha thought that was a good score, but she wanted

klasskru [66]

Answer:

Samantha's grade was 1.29 standard deviations above the class mean, that is, she scored better than 0.9015 = 90.15% of the class.

Step-by-step explanation:

Z-score:

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.

In this question:

She scored better a proportion of the class given by the p-value of z = 1.29

z = 1.29 has a p-value of 0.9015.

Samantha's grade was 1.29 standard deviations above the class mean, that is, she scored better than 0.9015 = 90.15% of the class.

6 0

3 years ago

garths taxable income last year was $66390. what is his state income tax? ( here is the math you have o do with the problem 3520

fredd [130]

Answer:

The state income tax = $3759

Step-by-step explanation:

The total taxable income = $66390