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3 years ago

Find the area of a circle having a circumference of 23π units. Round to the nearest tenth.

Mathematics

2 answers:

Ulleksa [173]3 years ago

7 0

Answer:

B. 415.5 units2

Step-by-step explanation:

charle [14.2K]3 years ago

4 0

Answer:

$\displaystyle 415,5\:units^2 ≈ A$

Step-by-step explanation:

In the circumference, 27 represents the diameter, and the radius is <em>half</em><em> </em>the diameter, so take half of it to get 11,5. Then use it in the area formula:

$\displaystyle πr^2 \\ \\ π11,5^2 = 132,25π ≈ 415,4756284 ≈ 415,5$

I am joyous to assist you anytime.

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Sara and Paul are on opposite sides of a building that a telephone pole fell on. The pole is leaning away from Paul at

r-ruslan [8.4K]

Answer:

a) See figure attached

b) $x = \frac{sin(124)}{sin(34)} 80.086 = 118.732 ft$

c) $h = 35 sin (59) = 30.0 ft$

So then the heigth for the building is approximately 30 ft

Step-by-step explanation:

Part a

We can see the figure attached is a illustration for the problem on this case.

Part b

For this case we can use the sin law to find the value of r first like this:

$\frac{sin(22)}{35 ft} =\frac{sin(59)}{r}$

$r= \frac{sin(59)}{sin(22)} 35 ft = 80.086ft$

Then we can use the same law in order to find the valueof x liek this:

$\frac{sin(124)}{x ft} =\frac{sin(34)}{80.086}$

$x = \frac{sin(124)}{sin(34)} 80.086 = 118.732 ft$

And that represent the distance between Sara and Paul.

Part c

For this cas we are interested on the height h on the figure attached. We can use the sine indentity in order to find it.

$sin (59) = \frac{h}{35}$

And if we solve for h we got:

$h = 35 sin (59) = 30.0 ft$

So then the heigth for the building is approximately 30 ft

5 0

3 years ago

Find all rational zeros of P(x)=6x^4-x^3-55x^2+9x+9

o-na [289]

Answer: x = -3, -1/3, 1/2, 3

Step-by-step explanation:

6 0

3 years ago

If z = 3cis30°, z3 in rectangular form is _____ +_____ i.

oee [108]

The rectangular form is 3c/30=z
Z=10 3c//30
10z+70x + 17x-10z

6 0

3 years ago

Shelby paid $1.75 for a notebook at a big 75% off sale. What was the original price of the notebook?

Shkiper50 [21]

Answer:

$7.00

Step-by-step explanation:

The discount is 75% off. To answer this question, multiply n (the original price) by (1.00 - 0.75): 0.25n = $1.75.

Solving this for n, we get $7.00

3 0

3 years ago

Which set of ordered pairs is a function?

fomenos

(5,5), (-5,5) is a function. To be a function x
cannot be repeated.

3 0

3 years ago