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3 years ago

Surface Area of a Cylinder=2πr2+2πrh.

2 answers:

4 0

The answer is 256pi if you have a calculator, and it says to put it in 3.14 for pi, do the same steps I show here, but instead of pi, you would put 3.14. But I hope this helps you

Elodia [21]3 years ago

3 0

2pi(4)^2= 100.5
2pi(4)(28)= 703.7
703.7+100.5= 804.2
The answer is 804.2cm^2

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Find the volume of this right rectangular prism. 4 cm 4 cm 4 cm [ ? ]cm3

andre [41]

Answer:

V = 64 cm^3

Step-by-step explanation:

Volume is length times width times height

V = l*w*h

V = 4*4*4

V = 64 cm^3

7 0

3 years ago

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Find the value of each trigonometric ratio!! Pls hurry!!!

Citrus2011 [14]

remember to use SOH CAH TOA. THE SOLUTION THAT I GOT CAME OUT AS 15/8

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3 years ago

Please explain who would i be able to get the answer to this problem.

SashulF [63]

We have been an quadratic equation $8k-k^{2} =42$ and we are asked to solve our equation.

Upon subtracting 42 from both sides of our equation we will get,

$8k-k^{2}-42 =0$

$-k^{2}+8k-42 =0$

$k^{2}-8k+42 =0$

Let us check whether our quadratic equation has any real roots using discriminant formula.

$D=b^{2}-4ac$

Upon substituting our given values in discriminant formula we will get,

$D=(-8)^{2} -4(1\cdot 42)$

$D=64 -168$

$D=-104$

We can see that D is less than zero, so our quadratic equation has no real roots.

Now we will use imaginary number i to find complex roots of our quadratic equation.

We will use $-1 =i^{2}$ to solve our equation.

$k=\frac{-b \pm \sqrt{b^{2}-4ac} } {2a}$

$k=\frac{--8 \pm \sqrt{(-8)^{2}-4(1*42)} } {2*1}$

$k=\frac{8 \pm \sqrt{64-168 }} {2}$

$k=\frac{8 \pm \sqrt{-1\cdot 104} } {2}$

$k=\frac{8 \pm \sqrt{i^{2}\cdot 104} } {2}$

$k=\frac{8\pm 2i \sqrt{26}}{2}$

$k=4\pm i \sqrt{26}$

Therefore, our answer will be $k=4\pm i \sqrt{26}$ .

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3 years ago

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horrorfan [7]

D because they all increase by the same number (+1)

7 0

3 years ago

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What is the difference in lengths of the plants that measured 1/4 and 1/8?

Natasha2012 [34]

Answer:

1/8

Step-by-step explanation:

1/4 = 2/8 2/8-1/8=1/8

7 0

4 years ago