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zzz [600]
3 years ago
9

A puffin is flying at 29 feet above sea level. What integer represents the change in elevation, in feet, that it will have to fl

y to reach sea level?
Mathematics
1 answer:
alexandr1967 [171]3 years ago
4 0

Answer:

348

Step-by-step explanation:

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US National forest cover approximately 300,000 square miles. conversationalist want the total square footage of forests to be 30
Sveta_85 [38]
E+10 is equivalent to 10^10 so, 9e+10 is equivalent to 9*10^10. 300,000^2 is 90000000000 square miles, where as the US has 4000000. Therefore, if the national forest were as large as the environmentalist wants them to be, the forest would be larger than the US, which is IMPOSSIBLE !!! As a result, this goal is not reasonable 
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3 years ago
4) There are 4 marbles and 3 cubes in a board game. The marbles are black, blue, yellow, and red. The cubes are numbered 1, 2, a
krek1111 [17]

Answer:

<u>Here is the sample space, its size is 4*3 = 12:</u>

  • Black 1
  • Black 2
  • Black 3
  • Blue 1
  • Blue 2
  • Blue 3
  • Yellow 1
  • Yellow 2
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3 0
2 years ago
Read 2 more answers
The mean points obtained in an aptitude examination is 159 points with a standard deviation of 13 points. What is the probabilit
Korolek [52]

Answer:

0.4514 = 45.14% probability that the mean of the sample would differ from the population mean by less than 1 point if 60 exams are sampled

Step-by-step explanation:

To solve this question, we have to understand the normal probability distribution and the central limit theorem.

Normal probability distribution:

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.

Central limit theorem:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a large sample size can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 159, \sigma = 13, n = 60, s = \frac{13}{\sqrt{60}} = 1.68

What is the probability that the mean of the sample would differ from the population mean by less than 1 point if 60 exams are sampled?

This is the pvalue of Z when X = 159+1 = 160 subtracted by the pvalue of Z when X = 159-1 = 158. So

X = 160

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

By the Central Limit Theorem

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

Z = \frac{160 - 159}{1.68}

Z = 0.6

Z = 0.6 has a pvalue of 0.7257

X = 150

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

Z = \frac{158 - 159}{1.68}

Z = -0.6

Z = -0.6 has a pvalue of 0.2743

0.7257 - 0.2743 = 0.4514

0.4514 = 45.14% probability that the mean of the sample would differ from the population mean by less than 1 point if 60 exams are sampled

7 0
3 years ago
I need this ASAP i need to make 5−4+7x+1= (blank)x + (blank) into a infinite,no and one solution
katrin2010 [14]

Answer:

7x + 2

Step-by-step explanation:

5 - 4 + 7x + 1

= 1 + 7x + 1

= 7x + 2

hope this helped u bud :)

5 0
3 years ago
A right triangle has three sides with length 148, 140, and 48. What is the length of the hypotenuse?
Oksanka [162]
145 i think im only three

5 0
3 years ago
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