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Drupady [299]
3 years ago
6

Need help ASAP thankyou!!!

Mathematics
1 answer:
vazorg [7]3 years ago
8 0

Answer:

a)Volume is 462cm3. Surface area is 374cm3.

b)volume

c)surface area

Step-by-step explanation:

Volume 14*11*3=462

Surface area 14*11*2= 308+ 11*3*2=66

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Why is 4 laps in 10 minutes and 6 laps in 15 minutes proportional
Shtirlitz [24]
If you break it down it goes to 2 laps every 5 minutes. So any set that follows this "pattern" would be proportional
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3 years ago
Subtract seven over eight minus two over three
Stells [14]

Answer:

5/24

Step-by-step explanation:

hope it works for u good luck

4 0
3 years ago
The Town of Hertfordshire clerk knows that 23% of dogs in the town have completed emotional support training. Hertfordshire plan
Nataly_w [17]

Answer:

95.64% probability that under 30% of the dogs are emotional support trained

Step-by-step explanation:

For each dog, there are only two possible outcomes. Either they have completed emotional support training, or they have not. So we use the binomial probability distribution to solve this problem.

However, we are working with samples that are considerably big. So i am going to aproximate this binomial distribution to the normal.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

Normal probability distribution

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.

When we are approximating a binomial distribution to a normal one, we have that \mu = E(X), \sigma = \sqrt{V(X)}.

In this problem, we have that:

\mu = E(X) = np = 100*0.23 = 23

\sigma = \sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{100*0.23*0.77} = 4.21

What is the probability that under 30% of the dogs are emotional support trained?

30% of 100 is 0.3*100 = 30

So this is the pvalue of Z when X = 30.

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

Z = \frac{30 - 23}{4.1}

Z = 1.71

Z = 1.71 has a pvalue of 0.9564.

So there is a 95.64% probability that under 30% of the dogs are emotional support trained

5 0
3 years ago
Can inverse operations that undo Another operation
ohaa [14]

Answer:

yes they can

Step-by-step explanation:

5 0
3 years ago
Question 4<br> Choose all numbers that make the inequality true.<br> -1 &gt;p
devlian [24]

Answer:

0 and above

Step-by-step explanation:

it can go onto infinity put 0 or Amy positive number and you got it

3 0
3 years ago
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