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3 years ago

Can someone answer this question please please help me I really need it if it’s correct I will mark you brainliest .

Mathematics

2 answers:

Fantom [35]3 years ago

5 0

Answer:

its the 3cm i did it

Step-by-step explanation:

Ghella [55]3 years ago

4 0

Step 1) Find the area of the faces

There are 4 triangular faces on this rectangular pyramid. In this case, they are all the same, because each triangle has the same base and height. We will find the area of 1 triangle and multiply it by 4 to find the area of all of the triangular faces.

A = 1/2 x 3 x 2

A = 1/2 x 6

A = 3

3 x 4 = 12

A = 12 cm^2

Step 2) Find the area of the base

The base has a length of 2 cm and a width of 2 cm. We can find the area of the base by multiplying the length and width because the base is a rectangle.

A = 2 x 2

A = 4 cm^2

Step 3) Add the areas together

Now, we need to add the area of the faces and the area of the base together to find the surface area.

A = 12 + 4

A = 16 square centimeters

Hope this helps! :)

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UNO [17]

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Step-by-step explanation:

First, we need to find out the total weight of the box

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Now, we need to convert 13 tons to pounds

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8 0

3 years ago

Read 2 more answers

If g(x)=k×f(x) what is the value of k?

Olegator [25]

Answer:

k = g(x)/f(x)

Step-by-step explanation:

Unless there is more to the question, the answer is g(x) / f(x) = k

You just need to divide both sides by f(x)

Here's an example

f(x) = 20x + 40

g(x) = 80x + 160

k = g(x)/f(x) = (80x + 160) / (20x + 40) = 4*(20x + 40)/(20x + 40)

k = 4

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3 years ago

David purchased a $ 155,000 home with a 7/23 balloon mortgage. His initial rate was 3.5%. At the end of the initial rate, I deci

swat32

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Step-by-step explanation:

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3 years ago

Which of these serves as a way to help get rid of waste and is most commonly found in animal cells not in plant cells?

Natasha2012 [34]

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3 years ago

GreenBeam Ltd. claims that its compact fluorescent bulbs average no more than 3.24 mg of mercury. A sample of 25 bulbs shows a m

amm1812

Answer:

Null hypothesis: $\mu \leq 3.24$

Alternative hypothesis: $\mu > 3.24$

Step-by-step explanation:

1) Previous concepts and data given

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

A right tailed test (sometimes called an upper test) is when the alternative hypothesis statement contains a greater than (>) symbol.

$\bar X=3.29$ represent the sample mean

s represent the sample standard deviation

n represent the sample selected

$\alpha$ significance level

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the mean for fluorescent bulbs is no more than 3.24 mg of mercury, the system of hypothesis would be:

Null hypothesis: $\mu \leq 3.24$

Alternative hypothesis: $\mu > 3.24$

IIf we know the population deviation we can apply a z test to compare the actual mean to the reference value, and the statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

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4 years ago