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storchak [24]
3 years ago
15

Simplify 8^2 /4+3.7(42.3-24.6)

Mathematics
2 answers:
Vaselesa [24]3 years ago
7 0

Answer     B

Step-by-step explanation:

I did it and got 63.19

Ira Lisetskai [31]3 years ago
6 0

Letter c

Step by step Explanation:

8²/4+3.7(42.3−24.6)

=64/4+3.7(42.3−24.6)

=16+3.7(42.3−24.6)

=16+(3.7)(17.7)

=16+65.49

=81.49

<em>hope this helps you!</em>

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4. The area of a rhombus with one diagonal is 8.72 cm long is the same as the area of a square of side 15.6 cm. Find the length
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Answer:

55.82 cm

Step-by-step explanation:

d1= 8.72 cm

a= 15.6 cm

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A square= 15.6²= 243.36 cm²

d2= 2A/d1= 2*243.36/8.72 ≈55.82 cm

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3 years ago
A truck has a total of b pounds of fruit in n identical boxes. How many
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Ian has 120 folders to file. So far, he has filed 36 of the folders. What percent of the folders does he have left to file?
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3 years ago
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4 0
3 years ago
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In a recent contest, the mean score was 210 and the standard deviation was 25. a) Find the z-score of John who scored 190 b) Fin
denpristay [2]

Answer:

a) Z = -0.8

b) Z = 2.4

c) Mary's score was 241.25.

Step-by-step explanation:

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 = 210, \sigma = 25

a) Find the z-score of John who scored 190

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

Z = \frac{190 - 210}{25}

Z = -0.8

b) Find the z-score of Bill who scored 270

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

Z = \frac{270 - 210}{25}

Z = 2.4

c) If Mary had a score of 1.25, what was Mary’s score?

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

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X - 210 = 25*1.25

X = 241.25

Mary's score was 241.25.

3 0
3 years ago
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