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Archy [21]
3 years ago
13

The radius of a circle is 3 cm. find the area in terms of pi​

Mathematics
2 answers:
astraxan [27]3 years ago
7 0

Answer:

9π

Step-by-step explanation:

Area of a circle = πr² (where r = radius of circle)

So using the formula ,

Area of the circle = π(3)² = 9π

Leto [7]3 years ago
6 0

Answer:

The area is 28.27cm²

Step-by-step explanation:

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The circumference of the equator of a sphere was measured to be 82 82 cm with a possible error of 0.5 0.5 cm. Use linear approxi
True [87]

Answer:

The maximum error in the calculated surface area is approximately 8.3083 square centimeters.

Step-by-step explanation:

The circumference (s), in centimeters, and the surface area (A_{s}), in square centimeters, of a sphere are represented by following formulas:

A_{s} = 4\pi\cdot r^{2} (1)

s = 2\pi\cdot r (2)

Where r is the radius of the sphere, in centimeters.

By applying (2) in (1), we derive this expression:

A_{s} = 4\pi\cdot \left(\frac{s}{2\pi} \right)^{2}

A_{s} = \frac{s^{2}}{\pi^{2}} (3)

By definition of Total Differential, which is equivalent to definition of Linear Approximation in this case, we determine an expression for the maximum error in the calculated surface area (\Delta A_{s}), in square centimeters:

\Delta A_{s} = \frac{\partial A_{s}}{\partial s} \cdot \Delta s

\Delta A_{s} = \frac{2\cdot s\cdot \Delta s}{\pi^{2}} (4)

Where:

s - Measure circumference, in centimeters.

\Delta s - Possible error in circumference, in centimeters.

If we know that s = 82\,cm and \Delta s = 0.5\,cm, then the maximum error is:

\Delta A_{s} \approx 8.3083\,cm^{2}

The maximum error in the calculated surface area is approximately 8.3083 square centimeters.

6 0
3 years ago
What is the area of the shaded region?<br> 36 m<br> 20 m<br> 36 m<br> 20 m
Nikitich [7]

Answer:

896 meters sq

Step-by-step explanation:

Step 1. Find the area of each square

Big square: 36 x 36 = 1296

Small square: 20 x 20 = 400

Step 2. Find the area of the shaded region only

big square A - small square A = ONLY shaded region area

1296 - 400 = A

896 m^{2} = A

I hope this helps!

6 0
2 years ago
Nicolas is setting up water stations for a 10-mile run. He already has the first one set up 8 miles from the starting line. He n
sesenic [268]
Let x be the distance of the additional water stations from the starting line.
We want on that is 1.5 miles behind the 8-mile water station, and one that is 1.5 miles ahead. The following absolute value function describes x:
|x-1.5| = 8
Two numbers comply: x= 9.5 and 6.5.
The additional water stations will be 6.5 and 9.5 miles from the starting line. 
5 0
3 years ago
Read 2 more answers
Someone please help me ASAP
valentina_108 [34]

Answer:

36.3 percent

Step-by-step explanation:

6 0
3 years ago
The answers are here I just need the work please!!
Flura [38]

the answer 236e

plzzzzzzzzzzz f u  ck off


4 0
4 years ago
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