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3 years ago

The diameter of a circle is 3 kilometers. What is the area?

Mathematics

2 answers:

user100 [1]3 years ago

6 0

Answer:

Step-by-step explanation:

hello :

the area is : πr² r : ridus r= 3km/2 = 1.5 km

so : the area is 3.14(1.5)² km² = 7.065 km²

lora16 [44]3 years ago

3 0

Answer:

7.068583471 km ^2

Step-by-step explanation:

pi x radius² is area

pi x 1.5² = the answer

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valentina_108 [34]

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3 years ago

Which of the following comparisons is FALSE?

dybincka [34]

Answer:

Step-by-step explanation:

Let's check each one-by-one.

we know 3.79 liters is 1 gallon, so 4 liters IS NOT LESS THAN 1 gallon

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4 0

3 years ago

the outdoor temperature was 8 degrees at midnight the. temperature declined 5 degrees during each. of the next 3 hours what was

LenKa [72]

-7 degrees would be the answer

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3 years ago

A structure is an intersecting hip roof with the main hip roof outside dimensions being 73 ft long and the width being 30 ft wid

malfutka [58]

Answer:

35 ft

Step-by-step explanation:

See attached file for detailed solution of the given.

6 0

3 years ago

A plane flies 450 miles with the wind, and 350 miles against the wind (in the same amount of time). If the wind is blowing at 30

adell [148]

Answer: = 240 mph.

Step-by-step explanation:

Let x = speed of the plane.

t= time taken

As per given, we have

$t=\dfrac{450}{x+30}\ \ \ ...(i)\\\\ t=\dfrac{350}{x-30}\ \ \ ...(ii)$ [Time = distance / speed]

From (i) and (ii), we get

$\dfrac{450}{x+30}=\dfrac{350}{x-30}\\\\\Rightarrow\ 450(x-30)=350(x+30)\\\\\Rightarrow\ 450x-13500=350x+10500\\\\\Rightarrow\ 450x-350x=10500+13500\\\\\Rightarrow\ 100x=24000\\\\\Rightarrow\ x=240$

Hence, the speed of the plane = 240 mph.

7 0

2 years ago