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lesantik [10]
2 years ago
10

Please help me with this homework

Mathematics
1 answer:
fiasKO [112]2 years ago
4 0

Answer:

It will be $2.40

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3.14 x 6.25 step by step
katen-ka-za [31]

Answer:

Step-by-step explanation:

3.14x6.25

19.625

8 0
3 years ago
Lengths of full-term babies in the US are Normally distributed with a mean length of 20.5 inches and a standard deviation of 0.9
mash [69]

Answer:

66.48% of full-term babies are between 19 and 21 inches long at birth

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.

Mean length of 20.5 inches and a standard deviation of 0.90 inches.

This means that \mu = 20.5, \sigma = 0.9

What percentage of full-term babies are between 19 and 21 inches long at birth?

The proportion is the p-value of Z when X = 21 subtracted by the p-value of Z when X = 19. Then

X = 21

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

Z = \frac{21 - 20.5}{0.9}

Z = 0.56

Z = 0.56 has a p-value of 0.7123

X = 19

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

Z = \frac{19 - 20.5}{0.9}

Z = -1.67

Z = -1.67 has a p-value of 0.0475

0.7123 - 0.0475 = 0.6648

0.6648*100% = 66.48%

66.48% of full-term babies are between 19 and 21 inches long at birth

5 0
2 years ago
Distributive 8(4x+9)
Mariulka [41]

Answer: 32x + 72

Step-by-step explanation:

8*4x  +8*9

32x +72

3 0
3 years ago
I will give you ALL of my 50 points if you did this
netineya [11]
If you send me the points I’ll do it in the comments
3 0
3 years ago
Dale drove 441 miles in 7 hours. At the same rate, how long would it take him to drive 315 miles?​
AURORKA [14]

Answer:

5 Hours

Step-by-step explanation:

He’s going 63 MPH

441/7 = 63 MPH

315/63 = 5 Hours

5 0
2 years ago
Read 2 more answers
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