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3 years ago

The radius of a circle is 3 centimeters. What is the circle's area? Use 3.14 for

Mathematics

2 answers:

fomenos3 years ago

7 0

Answer:

≈28.27

Step-by-step explanation:

The equation for the radius of circle - A=π $r^{2}$

plug in numbers - A=π* 3

≈28.27

Dominik [7]3 years ago

5 0

Answer:

28.26 square centimeters

Step-by-step explanation:

The area of a circle is pi*r^2, with pi=3.14.

3.14*3^2=28.26 square centimeters.

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The answer is 46.4° because you do tan^-1 and then 21÷20 in the calculator

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3 years ago

A gallon of gas has dropped to 2.85 if yesterday was 2.90 what is the percentage of decrease

vodomira [7]

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2 years ago

Determine whether quantities vary directly or inversely and find the constant of variation. 16 factory workers made 40 pieces in

Andrei [34K]

Answer:

Part A) $8\ workers$

Part B) $10\ workers$

Part C) $40\ workers$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

Let

x -----> the number of workers

y ----> the number of pieces made

In this problem

The relation between the variables x and y represent a direct variation (proportional variation)

For x=16, y=40

Find the value of the constant of proportionality k

$k=\frac{y}{x}$

substitute the values

$k=\frac{y}{x}$

$k=\frac{40}{16}\\k=2.5\ \frac{pieces}{worker}$

The linear equation is equal to

$y=2.5x$

Part A) How many workers are needed to make 20 pieces

For y=20 pieces

substitute in the linear equation

$20=2.5x$

$x=8\ workers$

Part B) How many workers are needed to make 25 pieces

For y=25 pieces

substitute in the linear equation

$25=2.5x$

$x=10\ workers$

Part C) How many workers are needed to make 100 pieces

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substitute in the linear equation

$100=2.5x$

$x=40\ workers$

3 0

3 years ago

Can someone please help

Bas_tet [7]

Number 6 is C, Number 7 is A. Do you need number 8? if so I will edit answer and add pic

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3 years ago

A hiker walks 11 km due north from camp and then turns and walks 11 km due east. What is the magnitude of the displacement (on a

Nuetrik [128]

Answer:16

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers