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lisov135 [29]
3 years ago
10

WILL GIVE BRAILNLIESTThe oblique pyramid has a square base. An oblique pyramid has a square base with a base edge length of 2 ce

ntimeters. The vertical height of the pyramid is 3.75 centimeters. What is the volume of the pyramid? 2.5 cm3 5 cm3 6 cm3 7.5 cm3
Mathematics
2 answers:
rusak2 [61]3 years ago
4 0

Answer:

6 cm^3

Step-by-step explanation:

kompoz [17]3 years ago
4 0

Answer:

The correct answer is B) 5 cm^3!!

Step-by-step explanation:

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The sum of 12 and the quantity 8 times a number k is equal to 48
Rudiy27
12+8k=48
=>8k=36
=>k=36/8
=>k=4.5
6 0
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Kelly made 6 batches of cookies. Her friend asked her to make an extra batch . She used 17 1/4 cups of sugar and needs another 7
Bess [88]

Answer:

Kelly needs 24 3/4 cups of sugar altogether.

Step-by-step explanation:

7 0
3 years ago
-2x - 10 =15 help me plzzzz
Dima020 [189]

Answer:

x = -12.5

Step-by-step explanation:

Solve :  -2x - 10 =15

-2x - 10 = 15

-2x = 15 + 10

-2x = 25

x = -25/2

x = -12.5

6 0
3 years ago
Read 2 more answers
A researcher reports survey results by stating that the standard error of the mean is 25 the population standard deviation is 40
bezimeni [28]

Answer:

a) A sample of 256 was used in this survey.

b) 45.14% probability that the point estimate was within ±15 of the population mean

Step-by-step explanation:

This question is solved using the normal probability distribution and the central limit theorem.

Normal probability distribution

When the distribution is normal, we use 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 normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

a. How large was the sample used in this survey?

We have that s = 25, \sigma = 400. We want to find n, so:

s = \frac{\sigma}{\sqrt{n}}

25 = \frac{400}{\sqrt{n}}

25\sqrt{n} = 400

\sqrt{n} = \frac{400}{25}

\sqrt{n} = 16

(\sqrt{n})^2 = 16^2[tex][tex]n = 256

A sample of 256 was used in this survey.

b. What is the probability that the point estimate was within ±15 of the population mean?

15 is the bounds with want, 25 is the standard error. So

Z = 15/25 = 0.6 has a pvalue of 0.7257

Z = -15/25 = -0.6 has a pvalue of 0.2743

0.7257 - 0.2743 = 0.4514

45.14% probability that the point estimate was within ±15 of the population mean

3 0
3 years ago
Hannah took p minuets to jog around a park. Sofia took 12 minuets longer to jog around the park. If sofia took t minutes to jog
Sladkaya [172]

Answer:

t = p + 12

Independent variable: p

Dependent variable: t

Step-by-step explanation:

7 0
2 years ago
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