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3 years ago

Whats the exact area of a circle with a radius of 13 feet

Mathematics

1 answer:

yuradex [85]3 years ago

6 0

Answer:

530.93 or if you round to the nearest tenth its 530.9 or nearest whole number its 531

Step-by-step explanation:

Hope this Helps

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Solve his problem for X and Y

Verizon [17]

Answer:

y = 5, 3; x = 171, 155

Step-by-step explanation:

8y - 15 = y^2

y^2-8y+15=0

y^2-3y-5y+15=0

y(y-3)-5(y-3)=0

(y-5)(y-3)=0

y can be 5 or 3.

x = 180 - (8y - 15)

x = 180 - (8(3)-15)

x = 180 - 9

x = 171

x = 180 - (8(5) - 15)

x = 180 - 25

x = 155

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3 years ago

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Step-by-step explanation:

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2 years ago

Determine the open t-intervals on which the curve is concave downward or concave upward. (Enter your answer using interval notat

Rashid [163]

Solution :

We have been given a parametric curve :

x = sin t , y = cos t , 0 < t < π

In order to determine concavity of the given parametric curve, we need to evaluate its second derivative first.

Therefore,

$\frac{dx}{dt} = \cos t, \ \frac{dy}{dt}= - \sin t$

$\therefore \frac{dy}{dx}= \frac{- \sin t}{\cos t}$

$=- \tan t$

Taking double derivatives of the above equation:

$\frac{d^2y}{dx^2}= - \frac{d}{dx}(\tan t)$

$= - \sec^2 t \frac{dt}{dx}$

$= - \sec^2 t \left(\frac{1}{\cos t}\right)$

$= - \sec^3 t$

For the concave up, we have

$\frac{d^2y}{dx^2} > 0$

$\Rightarrow - \sec^3 t > 0$

∴ $t \ \epsilon \left( \frac{\pi }{2}, \pi \right)$

For the concave down, we have

$\frac{d^2y}{dx^2} < 0$

$\Rightarrow - \sec^3 t < 0$

$t \ \epsilon \left( 0,\frac{\pi }{2} \right)$

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3 years ago

What is the solution for the system of equations?

Lena [83]

Answer:

1, 3

Step-by-step explanation:

// Solve equation [2] for the variable y

[2] y = x - 2

// Plug this in for variable y in equation [1]

[1] (x -2) + x = 4

[1] 2x = 6

// Solve equation [1] for the variable x

[1] 2x = 6

[1] x = 3

// By now we know this much :

y = x-2

x = 3

// Use the x value to solve for y

y = (3)-2 = 1

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3 years ago

Your team lost by 13 points. The opposing team scores 72 points. What was your final score?

DanielleElmas [232]

The final score is 59

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3 years ago

Whats the exact area of a circle with a radius of 13 feet​

Whats the exact area of a circle with a radius of 13 feet