All categories

3 years ago

What is the area of a circle whose radius is 4 ft?

Mathematics

1 answer:

ExtremeBDS [4]3 years ago

6 0

Answer:

16π ft²

Step-by-step explanation:

The formula is [ A = πr² ]

A = π(4)²

A = 16π

Best of Luck!

You might be interested in

Match the parametric equations with the verbal descriptions of the surfaces by putting the letter of the verbal description to t

alukav5142 [94]

Answer:

1. B

2. C

3. A

4. D

Step-by-step explanation:

The parametric equations of the circular cylinder are:

$x(u,v)=a\cos v\\y(u,v)=a\sin v\\z(u,v)=u$

If the orientation of the cylinder is changed to have the height $u$ along the x-axis, the parametric equations of the cylinder match:

$3. \mathbf{r} \left( u, v \right) = u \mathbf{i} + \cos v \mathbf{j} + \sin v \mathbf{k}$

The parametric equations of the circular paraboloid are:

$x(u,v)=u\cos v\\y(u,v)=u\sin v\\z(u,v)=u^2$

Using the units vectors the parametric equations match:

$1. \mathbf{r} \left( u, v \right) = u \cos v \mathbf{i} + u \sin v \mathbf{j} + u^{2} \mathbf{k}$

The parametric equations of the cone are:

$x(u,v)=au\cos v\\y(u,v)=au\sin v\\z(u,v)=u$

Using the units vectors and rotating the base of the cone from $z=0$ to $x=0$ the parametric equations match:

$2. \mathbf{r} \left( u, v \right) = u \mathbf{i} + u \cos v \mathbf{j} + u \sin v \mathbf{k}$

The equation left is the equation of a plane:

$4. \mathbf{r} \left( u, v \right) = u \mathbf{i} + v \mathbf{j} + \left( 2u - 3v \right) \mathbf{k}$

5 0

4 years ago

What is the value of x? Enter your answer in the box. x =

d1i1m1o1n [39]

Answer:

x=20

Step-by-step explanation:

We can use similar triangle to find x. Put the smaller triangle over the larger triangle.

11 10

-------- = ----------

121+11 10 +5x+10

Combine like terms

11 10

-------- = ----------

132 20+5x

Using cross products

11 (20+5x) = 132*10

Distribute

220 +55x = 1320

Subtract 220 from each side

220-220 +55x = 1320-220

55x = 1100

Divide by 55

55x/55= 1100/55

x =20

6 0

3 years ago

jan has 12 ounce milkshake. for ounces in the milkshakes are vanilla, and the rest is chocolate. what are to equivalent fraction

vlada-n [284]

4/12 are vanilla or 2/6 8/12 are chocolate or 4/6

6 0

3 years ago

Read 2 more answers

The total cost of a pair of jeans and three shirts is $114. The shirts each cost the same amount, and the jeans are $45. What is

Sloan [31]

The price per shirt is $23.

5 0

4 years ago

Read 2 more answers

Use the data to create a scatter plot. Plz help

LuckyWell [14K]

Use this above picture to help you out!!

7 0

4 years ago