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Cloud [144]
2 years ago
10

HELPP PLEASE!!!!!

Mathematics
2 answers:
jasenka [17]2 years ago
8 0

Answer:

I think C 45 blocks are the right answer.

andreyandreev [35.5K]2 years ago
6 0

Answer: B 45

Step-by-step explanation: bc 9 x 5 +45

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The demand for a daily newspaper at a newsstand at a busy intersection is known to be normally distributed with a mean of 150 an
AURORKA [14]

Answer:

171 newspapers.

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 = 150, \sigma = 25

How many newspapers should the newsstand operator order to ensure that he runs short on no more than 20% of days

The number of newspapers must be on the 100-20 = 80th percentile. So this value if X when Z has a pvalue of 0.8. So X when Z = 0.84.

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

0.84 = \frac{X - 150}{25}

X - 150 = 0.84*25

X = 171

So 171 newspapers.

4 0
3 years ago
A worm moves forward 3/8 inch every 5 minutes for 1 hour 25 minutes. How fast does the worm move in this time?
Alina [70]
Multiply <span>3/8 inch by 75 and divide by 5</span>
6 0
3 years ago
Read 2 more answers
Exponential Growth and Decay The expressions below represent either exponential growth or exponential decay. Check all the expre
Tomtit [17]

Answer:

First one: 5x3(0.75)2t

and fourth one: 0.05x500(0.005)t

Step-by-step explanation:

In order to have an exponencial decay, the rate of the exponencial function needs to be lesser than 1.

The rate is the value between parenthesis, so in the first equation, the rate is 0.75, so this is an exponencial decay.

The second equation has rate = 2.4, so this is not an exponencial decay.

The third equation has rate = 1.04, so this is not an exponencial decay.

The fourth equation has rate = 0.005, so this is an exponencial decay.

5 0
2 years ago
Read 2 more answers
Can someone help answer the first two?
Murljashka [212]

Answer:

below given!

Step-by-step explanation:

1) mean = (7.4 + 5.8 + 7.3 + 7 + 8.9 + 9.4 + 8.3 + 9.3 + 6.9 + 7.5 + 9 + 5.8 + 5.5 + 8.6 + 9.3 +3.8) / 16

mean = 7.47

5 0
2 years ago
Apple juice and cranberry juice have been mixed in the ratio
Likurg_2 [28]
  • Answer:

2.5875

Step-by-step explanation:

look first the mixture is 4 Apple: 5 cranberry okay and the will make 1:5 littre so you will mince 4:5 from 1:5 and you will get 3:5. 3 for appple.and 5 for the other so you will make the next equations 3×0.45=     . and 5×0.8=   . and you will get the apple price and the second price so you will make new apple price: new  cranberry price=

7 0
3 years ago
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