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kaheart [24]
3 years ago
13

Which expression is equivalent to -8 + 7.25 – 6 + 0.5?

Mathematics
2 answers:
kvasek [131]3 years ago
6 0
The answer is c. :))
AURORKA [14]3 years ago
6 0
The answer for this question is B
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Find the surface area of the sphere.
Mila [183]

A = 201.1\:\text{cm}^2

Step-by-step explanation:

Given: r = 4 cm

The surface area A of a sphere is given by

A = 4\pi r^2 = 4\pi(4\:\text{cm})^2

\:\:\:\:\:= 201.1\:\text{cm}^2

6 0
3 years ago
An English professor assigns letter grades on a test according to the following scheme. A: Top 14% of scores B: Scores below the
NeX [460]

Answer:

Grades between 62 and 64 result in a D grade.

Step-by-step explanation:

Problems of normally distributed samples are 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 = 71.9, \sigma = 7.8

Find the numerical limits for a D grade.

D: Scores below the top 84% and above the bottom 10%

So below the 100-84 = 16th percentile and above the 10th percentile.

16th percentile:

This is the value of X when Z has a pvalue of 0.16. So X when Z = -0.995.

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

-0.995 = \frac{X - 71.9}{7.8}

X - 71.9 = -0.995*7.8

X = 64

10th percentile:

This is the value of X when Z has a pvalue of 0.1. So X when Z = -1.28.

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

-1.28 = \frac{X - 71.9}{7.8}

X - 71.9 = -1.28*7.8

X = 62

Grades between 62 and 64 result in a D grade.

6 0
3 years ago
Can you help me please?
Vinvika [58]

The range of a function are the possible outputs, here { 2, 6, 8 }.

Answer: D

5 0
3 years ago
What is the function for the arithmetic sequence 2,7,12,17,22
Deffense [45]


The common difference, d, is 5 and the starting value, a, is 2.
Filling this in the form of x_n=a+d(n-1)

<span>you get

</span>x_n = 2+5(n-1)
3 0
3 years ago
Read 2 more answers
Which terms complete the factorization of x2+27x+162 represented by the model?
Anarel [89]

Answer:

9, 9x, 18x

Step-by-step explanation:

Hence the B. I hope this helps love!

4 0
2 years ago
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