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3 years ago

Find the volume of the regular pyramid given that 12 cm is the height of the pyramid.

Mathematics

2 answers:

PolarNik [594]3 years ago

8 0

Answer:

256.4

Step-by-step explanation:

e-lub [12.9K]3 years ago

7 0

D........................ 256.4.............

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Dave and ryan share some money in the ratio 7 : 4 . dave got $28, how much did ryan get?

Ronch [10]

Answer:

$16

Step-by-step explanation:

28/7=4

4*4=16

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3 years ago

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Ganezh [65]

It’s 3.5

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2 years ago

This is confusing<br> (2x+y)^2−(x−2y)^2

Iteru [2.4K]

Answer:

${(2x + y)}^{2} - {(x - 2y)}^{2}$

$< {(x + y)}^{2} = {x}^{2} + 2xy + {y}^{2} >$

$< {(x - y)}^{2} = {x}^{2} - 2xy + {y}^{2} >$

${(2x)}^{2} + 2(2x)(y) + {(y)}^{2} - {(x)}^{2} - 2(x)(2y) + {(2y)}^{2}$

${4x}^{2} + 4xy + {y}^{2} - {x}^{2} - 4xy + {4y}^{2}$

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3 years ago

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The business college computing center wants to determine the proportion of business students who have personal computers (PC's)

Anastasy [175]

Answer:

Option A) reject null hypothesis if z is greater than 1.645

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 250

p = 30% = 0.3

Alpha, α = 0.05

Number of women belonging to union , x = 75

First, we design the null and the alternate hypothesis

$H_{0}: p = 0.3\\H_A: p > 0.3$

This is a one-tailed(right) test.

Rejection Region:

$z_{critical} \text{ at 0.05 level of significance } = 1.645$

So, the rejection region will be

$z > 1.64$

That is we will reject the null hypothesis if the calculated z-statistic is greater than 1.645

Option A) reject null hypothesis if z is greater than 1.645

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3 years ago

A bag contains 3 gold marbles, 9 silver marbles, and 20 black marbles. Someone offers to play this game: You randomly select one

Genrish500 [490]

What’s the question?

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2 years ago