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2 years ago

PLEASE ANSWER ASAP FOR BRAINESLT!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

Ilia_Sergeevich [38]2 years ago

5 0

Answer:

Step-by-step explanation:

Circumference = Pi * radius^2

The radius is half of the diameter, 23.

I am Lyosha [343]2 years ago

5 0

Answer:

It's c

Step-by-step explanation:

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What value for c will make the expression a perfect square trinomial? X^2-7x+c

gavmur [86]

Answer: c= 49/4

Step-by-step explanation:

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3 years ago

Find the surface area of the hemisphere 6cm

lina2011 [118]

Answer:

452.4 cm^2

Step-by-step explanation:

$a = 4\pi {r}^{2} \\ a = 4 \pi \times (6)^{2} \\ a = 452.4 \: cm^{2}$

I hope that is useful for you :)

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3 years ago

Find the area of the shaded regions. Give your answer as a completely simplified exact value in terms of π (no approximations).

masya89 [10]

Answer:

$40\pi \ m^{2}$

Step-by-step explanation:

we know that

The area of a circle is equal to

$A=\pi r^{2}$

In this problem we have

$r=10\ m$

Substitute and find the area

$A=\pi (10)^{2}=100 \pi\ m^{2}$

Remember that

$360\°$ subtends the area of complete circle

by proportion

Find the area of the shaded regions

The central angle of the shaded regions is equal to $2*72\°=144\°$

$\frac{100\pi }{360} \frac{m^{2}}{degrees} =\frac{x }{144} \frac{m^{2}}{degrees} \\ \\x=144*100\pi /360\\ \\ x=40\pi \ m^{2}$

6 0

2 years ago

What is the answer to a and b please and thank you

vagabundo [1.1K]

A.) according to the graph, Austin appears to be burning 10 calories per minute. If you look at a perfect point on the graph, which I chose (50,5) and you do x over y or calories per minute, you get a unit rate of 10 calories per minute.

b.) Since you have already found the unit rate in question a, your slope would be 10.

5 0

3 years ago

How to solve it because i have no idea

Angelina_Jolie [31]

First you chang top fractions into decimal add and divide that by 4 which is equal to 0.375 hope it helps.

5 0

3 years ago