4 years ago

How to caculate area of a circle?

Mathematics

2 answers:

grigory [225]4 years ago

7 0

A=pi r elevate 2 A=πr2

Aleks [24]4 years ago

6 0

The area of a circle is pi times the radius squared (A = π r²). Example of calculating the area of a circle is in the image below.

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Trevor spent $27 an now he has no money left.he had what number before his purchase

sdas [7]

Let the money Trevor had before purchase be x.

After his purchase, he has no money left.

So, x - 27 = 0

x = 27.

Hence, Trevor had $27 before his purchase.

5 0

3 years ago

A bacteria colony increases in size at a rate of 4.0565e1.3t bacteria per hour. If the initial population is 54 bacteria, find t

Dovator [93]

Answer:

Population of bacteria four hours later $A=616.5187$ or nearest whole number

$A=616$

Step-by-step explanation:

Given,

Let amount of bacteria four hours later is=A

Rate of increase of bacteria per hour $=\frac{\partial x}{\partial t}=4.0565e^{1.3t}$

Initial population of bacteria is =54

Time 4 hours

Find the population of bacteria 4 hours later

Solution,

$\int_{54}^{A}dx=\int_{0}^{4}4.0565e^{1.3t}dt$

$\left [ x \right ]_{54}^{A}=4.0565/1.3\left [e^{1.3t} \right ]_{0}^{4}$

$A-54=4.0565/1.3\left ( e^{1.3\times 4} -1\right )$

$A-54=562.5187301$

$A=562.5187301+54$

$A=616.5187$

Population of bacteria 4 hours later is $A=616$

8 0

4 years ago

I need help please!!

lana66690 [7]

Answer:

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3 0

3 years ago

Find the area of a square with side length x when x is equal to the given value.

Wittaler [7]

Answer:

The area is 225 and they are not directly proportional

Step-by-step explanation:

find the area by doing 15 x 15 which is 225

6 0

3 years ago

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vodomira [7]

Answer:i think its b

Step-by-step explanation:

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2 years ago

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