All categories

3 years ago

Find the radius of this circle. A = ar2 r = [?] ft A = 9aft?

Mathematics

1 answer:

Sergeu [11.5K]3 years ago

6 0

Answer:

A = $\pi$ . r^2

If A = 9 $\pi$ ft^2

$\pi$ . r^2 = 9 $\pi$ ft^2

r^2 = 9ft^2

r = sqrt(9ft^2)

r = 3ft ( r>0)

Step-by-step explanation:

You might be interested in

Find two fractions equivalent to each fraction. 3 over 9 20 over 22

Anvisha [2.4K]

Answer:

1/3 and 10/11, or 9/27 and 40/44

Step-by-step explanation:

Simplified 3/9 by 3.

Simplified 20/22 by 2.

7 0

3 years ago

Read 2 more answers

1,234,000 in scientific notation

lara31 [8.8K]

1,234,000 in scientific notation = 1.234 x 10^6

---------------------------

3 0

3 years ago

What is the oblique asymptote of the function f(x) = the quantity of x squared plus x minus 2, all over x plus 1?

Archy [21]

The oblique asymptote is y = x
This is a slant asymptote

You can find this by performing polynomial long division. See the attached image for how to do the division. The quotient is the single "x" up at the very top. The remainder is -2 at the very bottom. The oblique asymptote is equal to the quotient.

8 0

3 years ago

slader (a) Find parametric equations for the line through (4, 1, 8) that is perpendicular to the plane x − y + 4z = 2. (Use the

Pavel [41]

Answer:

(x(t), y(t), z(t)) = (4 + t, 1 - t, 8 + 4t)

xy - plane (x, y, z) = (2, -1, 0)

yz - plane (x, y, z) = (0, 5, -8)

xz - plane (x, y, z) = (5, 0, 12)

Step-by-step explanation:

The given point (x, y ,z) = (4, 1, 8)

The plane x -y + 4z = 2

Normal vector (n) = < 1, -1, 4 >

The equation of line through point (4, 1, 8) and the plane is:

(x(t), y(t), z(t)) = (4, 1, 8) + t(1, -1, 4)

(x(t), y(t), z(t)) = (4 + t, 1 - t, 8 + 4t)

Any point on the line P(x, y, z) = ( 4 + t, 1 - t, 8 + 4t)

xy-Pane ⇒ z = 0

8 + 4t = 0

4t = - 8

t = -8/4

t = -2

∴

(x, y, z) = (4 - 2, 1 - 2, 8 + 4(-2))

(x, y, z) = (2, -1, 0)

yz-plane ⇒ x = 0

4 + t = 0

t = -4

∴

(x, y, z) = (4 + (-4) , 1-(-4), 8 + 4(-4)

(x, y, z) = (0, 5, -8)

xz-plane ⇒ y = 0

1 - t = 0

-t = -1

t = 1

∴

(x, y, z) = ( 4 + 1, 1 - 1, 8 + 4(1) )

(x, y, z) = (5, 0, 12)

6 0

3 years ago

Belinda is making doughnuts. If the recipe calls for 2 cups of sugar, and each cup of sugar weighs 2 3 pounds, how many pounds o

IceJOKER [234]

Answer: D. 1 & 1/3

Step-by-step explanation: Here is how I got the answer. I have to figure out what 2 cups of sugar weigh in pounds. The question says 1 cup weighs 2/3 of a pound. So what I did, was I multiplied 2/3 by 2, or 2/1. that'll give us an answer, of 1 1/3 pounds.

Hope this helped, though probably it didn't.

5 0

3 years ago

Read 2 more answers