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3 years ago

Pls help my teacher is so rude

Mathematics

1 answer:

storchak [24]3 years ago

3 0

The third one hope this helps

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What is the volume of a cone with a radius of 12 and a height of 8?

nadya68 [22]

Answer:

Volume of a cone= $\frac{1}{3} \pi r^{2}h$

= $\frac{1}{3}$ × $\frac{22}{7}$ ×144×8

= $\frac{22}{21}$ ×144×8

=1206.86 $cm^{2}$

Step-by-step explanation:

8 0

3 years ago

IVE BEEN TRYING TO GET THIS FIGURED OUT SINCE 1:00AM MY EYES ARE RED IVE GOTTEN 0 SLEEP, AND I JUST NEEEEEED HELLLLPPPPP 10 PTS

Ede4ka [16]

19,526,000÷5280= 3700 miles :)

5 0

3 years ago

What is the equation in slope-intercept form of the line passing through (-2,0) and (2,8)

sesenic [268]

Y=2x+4 is your answer

5 0

3 years ago

Solve the equation: Sin2x - Sinx = 0

Viktor [21]

We know that sin2x=2sinxcosx
(search the net for proof if you wish)

So the original equation becomes

2sinxcosx-sinx=0
The two terms both have sinx that can be taken out to get:

sinx(2cosx-1)=0
This is true if sinx=0 or 2cosx-1=0 , rewritten: cosx=1/2

sinx=0 than x=2kπ
cosx=1/2 than x=π/3+2kπ
where k is an integer

5 0

4 years ago

Area triangles? it says show work so pls do

coldgirl [10]

$\large{\underline{\underline{\pmb{\sf {\color {blue}{Solution:}}}}}}$

Given,

Area = 225 yd²

Base = 30 yd

Height = [To be calculated]

To find:

The height of the given triangle.

We know that, area of a triangle is:

$\frac{1}{2} \times (b \times h) \\ \\ \leadsto \frac{1}{2} \times (30 \times h) \\ \\ \leadsto \frac{1}{2} \times 30h \\ \\ \leadsto \frac{1}{ \cancel{2}} \times \cancel{30}h \\ \\ \leadsto1 \times 15h \\ \\ \leadsto \: h = 15 \: yd$

Therefore, the require height is 15 yd.

$\green\star$ Proof:

$\frac{1}{2} \times (b \times h) \\ \\ \leadsto \frac{1}{2} \times (30 \times 15) \\ \\ \leadsto \frac{1}{ \cancel{2}} \times \cancel{450} \\ \\ \leadsto1 \times 225 \\ \\ area = 225 {yd}^{2}$

$\boxed{ \frak \red{brainlysamurai}}$

6 0

2 years ago