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2 years ago

What is the area of the circle?

Mathematics

2 answers:

Tanzania [10]2 years ago

6 0

Area = $\pi$ * r^2
= $\pi$ * 1.8^2
= 10.1787602m^2

Natasha_Volkova [10]2 years ago

4 0

A = PI * (r)^2

A = PI * (1.8)^2

A = ~3.14 * 3.24

A = <span>10.1787601976</span>

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The correct answer is 14.

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Answer:

Step-by-step explanation:

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3 years ago

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3 years ago

Read 2 more answers

The number of mosquitoes in Anchorage, Alaska (in millions of mosquitoes) as a function of rainfall (in centimeters) is modeled

GarryVolchara [31]

Answer:

7 centimeters of rain will produce the maximum number of mosquitoes (49 millions of mosquitoes)

Step-by-step explanation:

we have the function

$m(x)=-x^2+14x$

where

m(x) is the number of mosquitoes in Anchorage, Alaska (in millions of mosquitoes)

x is the rainfall (in centimeters)

This is a vertical parabola open downward

The vertex represent a maximum

The x-coordinate of the vertex represent the centimeters of rain that will produce the maximum number of mosquitoes

Convert the quadratic equation into vertex form

$m(x)=-x^2+14x$

Factor -1

$m(x)=-(x^2-14x)$

Complete the square

$m(x)=-(x^2-14x+7^2)+7^2$

$m(x)=-(x^2-14x+49)+49$

Rewrite as perfect squares

$m(x)=-(x-7)^2+49$

The vertex is the point (7,49)

therefore

7 centimeters of rain will produce the maximum number of mosquitoes (49 millions of mosquitoes)

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2 years ago