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4 years ago

Find the exact circumference of a circle with diameter equal to 8 ft

2 answers:

lina2011 [118]4 years ago

6 0

The formula for circumference is C= 2(pi)(r)^2. Because diameter is double the radius, and the diameter is 8 ft, the radius is 4 ft. So, plug that into the equation, and you get: C=2(pi)(4)^2. The answer is 32 pi ft. If the question asks for the exact answer, keep the pi as it is, but if it says to round, multiply 32 by pi and round.

Nata [24]4 years ago

4 0

Answer:

Diameter = 8 ft

Circumference = πD

Circumference = 22/7 × 8 = 25.14 ft

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4232 divided by 18 also estimate

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In this diagram, BAC~ EDF. if the area of BAC = 6 in, what is the area of EDF.

gulaghasi [49]

Answer:

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Step-by-step explanation:

$\triangle BAC \sim \triangle EDF... (Given) \\$

$\therefore$ By area of similar triangle theorem:

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4 years ago

The places X and Y are 76km apart on a highway one car starts from Y and other from X at the same time. If the cars travel in th

Julli [10]

Answer:

Fast car = 45.6

Slower car = 30.4

Step-by-step explanation:

Let the speed of the first car = x

Let the speed of the second car = y

Travelling towards each other.

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x*5 - y*5 = 76 miles. This is kind of tricky. You have to understand that the first car that is 76 miles from the second car and makes up that 76 in 5 hours. The distance they both travel is subtracted out.

Divide by 5

x - y = 76/5

x - y = 15.2 The speeds differ by 15.2

x + y = 76

x - y = 15.2

2x = 91.2

x = 45.6

y = 76 - 45.6 = 30.4

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