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3 years ago

Lisa can paint a wall in four hours. Sissi needs eight hours to paint the wall. How long will it take if they are helped?

Mathematics

1 answer:

never [62]3 years ago

4 0

Answer:

It will take very less time actually. we cannot say accurately because if two girls start to chat they will till next day

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A round cake has a diameter of 30\text{ cm}30 cm30, start text, space, c, m, end text. Angela places the cake on a circular cake

VLD [36.1K]

Answer:

The circumference of the cake board is <u>35π cm</u>.

Step-by-step explanation:

The question is incomplete, so the complete question is below:

A round cake has a diameter of 30 cm. Angela places the cake on a circular cake board with a diameter 5 cm longer than that of the cake. What is the circumference of the cake board? Give your answer in terms of π.

Now, to find the circumference of the cake board.

As, given diameter of cake = 30 cm.

And diameter of cake board is 5 cm longer than that of the cake.

Thus, the diameter of cake board is:

$30\ cm+5\ cm=35\ cm.$

So, to find the circumference we need radius, by putting formula:

$Radius(r)=\frac{Diameter}{2}$

$Radius(r)=\frac{35}{2}$

$Radius(r)=17.5\ cm.$

Now, to get the circumference of the cake board we put formula:

$Circumference=2\pi r.$

$Circumference=2\times \pi \times 17.5$

$Circumference=35\pi \ cm.$

Therefore, the circumference of the cake board is 35π cm.

4 0

3 years ago

Please help me with this i’m stuck

bagirrra123 [75]

Answer:

A ) Substitute the side lengths of a and b in the equation

Step-by-step explanation:

The hypotenuse which is opposite the right angle it always the length of C in the cosine rule.

5 0

3 years ago

Determine the range of the following graph:

Gnoma [55]

Answer:(-infinity, infinity)

Step-by-step explanation: the end behavior shows that it forever goes up or down.

4 0

3 years ago

The central limit theorem states that sampling distributions are always the same shape as the population distribution from whenc

sergejj [24]

Explanation:

The sample mean is not always equal to the population mean but if we take more and more number of samples from the population then the mean of the sample would become equal to the population mean.

The Central Limit Theorem states that we can have a normal distribution of sample means even if the original population doesn't follow normal distribution, But we have to take a lot of samples.

Suppose a population doesn't follow normal distribution and is very skewed then we can still have sampling distribution that is completely normal if we take a lot of samples.

3 0

3 years ago

Can geniuses tell the right answer?

Kazeer [188]

Answer:

under the 48 is -24

on the right side of 6 is -5

on the right side of 48 is -40

7 0

3 years ago