#15-5: find the circumference of a circle that has a radius of 84 inches. use (pi sign) for pi.

To find the circumference of a circle when you know its radius, use , where is the diameter.

Substitute in the radius of 84.

Multiply the constants.

The formula for the circumference of a circle is:

2πr

In this case the radius is 84. Plug this into the equation given above.

2π * 84

Multiply 2 and 84

168π <<< This is the exact answer

The approximate answer is:

527.79

Hope this helped!

~Just a girl in love with Shawn Mendes

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

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