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FromTheMoon [43]
3 years ago
5

If the circumference of a circle measures 12π cm, what is the area of the circle in terms of π?

Mathematics
1 answer:
frez [133]3 years ago
5 0
So the formula for the circumference of a circle is π x diameter
Since we know the the circumference already, we just divide that by π:

12π / π = 12

Now we halve the diameter to get the radius:
12 / 2 = 6 

The area of a circle is π x radius²
So the area is:

·π x 6² = 36π·  (or 113 not in terms of π) 
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The cost of painting a wall that is 5 meters wide and 212 meters tall is $50. How many square meters can be painted for $1?
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Answer:

21.2 square meters

Step-by-step explanation:

The area of a parallelogram is base • height.

So:

1. Calculate the area of what you can get for $50. 5 • 212 = 1060 square meters.

2. Now you divide the first price ($50) by the desired price ($1). This one is easy because 50 / 1 = 50, but I'm putting this here for future reference in case you need to solve a problem that has a desired price that's greater than $1.

3. Divide the answer to step one by the answer to step two to get the area you can have painted for $1. 1060 / 50 = 21.2 square meters.

3 0
2 years ago
How do you find the inverse of the exponential growth function?
suter [353]

Answer:

The inverse function of f(x) is ... f⁻¹(x) = log (x/9.16)/log (1.0054)

Step-by-step explanation:

Starting equation... f(x) = 9.16(1.0054)ˣ

Visually rewritten... y = 9.16(1.0054)ˣ

Flipping x and y... x = 9.16(1.0054)ʸ

Isolating (1.0054)ʸ... x/9.16 = (1.0054)ʸ

Taking the log of both sides... log (x/9.16) = y log (1.0054)

Isolating y... log (x/9.16)/log (1.0054) = y

Solution... y = log (x/9.16)/log (1.0054)

6 0
2 years ago
What is the missing exponent in the equation 2? = 16?
IRISSAK [1]

Answer:

4

Step-by-step explanation:

2x2x2x2 = 16

5 0
3 years ago
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Answer:

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but...

since there's gaps its more likely that there a 1/2 in or 3/4 in

Step-by-step explanation:

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anzhelika [568]

Answer:

o

Step-by-step explanation:

-4h=32

h=32/-4

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<h2>stay safe healthy and happy.</h2>
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2 years ago
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