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goldfiish [28.3K]
3 years ago
9

Find the area of a circle, diameter measures 30 ft​

Mathematics
2 answers:
Furkat [3]3 years ago
8 0

Answer:

The A≈706.86

Step-by-step explanation

A=πr2

d=2r

Solving for A

A=1

4πd2=1

4·π·302≈706.85835

Hope this helps : )

rjkz [21]3 years ago
4 0

Answer:

225π or 706.86

Step-by-step explanation:

Area of a circle is πr²

r=half of the diameter

r=30÷2

r=15

π15²=A

π225=A

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A regular hexagon is shown.
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The central angle of the hexagon is equal to 60º.

Therefore, the trigonometric relationship for the radius is given by:

cos (30) = \frac{a}{c}

Where,

a: apothema of the hexagon

c: Hexagon radius.

Clearing the radio we have:

c = \frac{a}{cos (30)}

Substituting values:

c = \frac{12}{cos (30)}  c = 13.85

Rounding to the nearest whole number we have:

c = 14 in

Answer:

The measure of the radius, c, rounded to the nearest inch is:

C. 14 in.

7 0
3 years ago
Read 2 more answers
Water is pumped out of a holding tank at a rate of 6-6e^-0.13t liters/minute, where t is in minutes since the pump is started. I
astraxan [27]
Procedure:

1) Integrate the function, from t =0 to t = 60 minutues to obtain the number of liters pumped out in the entire interval, and

2) Substract the result from the initial content of the tank (1000 liters).

Hands on:

Integral of (6 - 6e^-0.13t) dt  ]from t =0 to t = 60 min =

= 6t + 6 e^-0.13t / 0.13 = 6t + 46.1538 e^-0.13t ] from t =0 to t = 60 min =

6*60 + 46.1538 e^(-0.13*60) - 0 - 46.1538 = 360 + 0.01891 - 46.1538 = 313.865 liters

2) 1000 liters - 313.865 liters = 613.135 liters

Answer: 613.135 liters



 

3 0
3 years ago
What is 32/10 as a whole or mixed number in simplest form?
STatiana [176]
It would be 3 with be on the side and then 2/10
7 0
3 years ago
What is the volume and surface area of the figure below?
Artist 52 [7]

Answer:

51.8125 yd (not rounded)

3 0
3 years ago
In your computation, approximate its value as 3.14.
andrey2020 [161]

Answer: d

Step-by-step explanation:

Find the area of the rectangle.

A=l*w\\A=(15in)(12in)\\A=180in^2

Find the area of the base of the semicircle.

A=\pi r^2

12 in would be the diameter, divide by 2 to get the radius.

\frac{12}{2}=6

Plug this into the formula.

A=(3.14)(6)^2\\A=113.04in^2

Since we do not have a full circle but a semi one instead, we must divide our result by 2.

\frac{113.04}{2}=56.52in^2

Add both areas.

180+56.52=236.52in^2

7 0
3 years ago
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