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Marysya12 [62]
3 years ago
10

If π is rounded to a whole number, what is a reasonable estimate for the circumference of a circle with a diameter of 9 cm?

Mathematics
1 answer:
mel-nik [20]3 years ago
8 0
Pi rounded to a whole number would equal three. Circumference equals 2pi*r. The radius in this case is half of the diameter, so 4.5 cm. 2 times pi, or three equals 6 times 4.5 is 27
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one cabinet measures 3 feet by 2.5 feet by 5 feet. a second measures 4 feet by 3.5 feet by 4.5 which volume is greater explain
prisoha [69]
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3 0
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Ben paid $900 for a sofa .the price of the sofa juana purchased 2/3 the price that ben paid.how much did juana pay for her sofa
agasfer [191]

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5 0
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Order from greatest to least 10.9, 10 2/5, 10 1/4
Ede4ka [16]

Answer:10.9,,,,,10 2/5,,,,,10 1/4

Step-by-step explanation:

3 0
3 years ago
Please help me with 13 and 15 asap
Law Incorporation [45]
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3 0
3 years ago
Which triangle is it ?
coldgirl [10]
The answer is: The first triangle. The reasons are shown below:

 1. All the triangles are rigth triangles, because they have an angle of 90°. So, let's calculate the others angles of the first one:

 Tan(α)^-1= opposite leg/adjacent leg

 Opposite leg=5
 Adjacent leg=5√3

 Tan(α)^-1= 5/5√3
 Tan(α)^-1=30°

 2. Let's calculate the other angle:

 Tan(α)^-1= opposite leg/adjacent leg

 Now, the opposite leg will be 5√3 and the adjacent leg will be 5. Then:

 Tan(α)^-1= 5√3/5
 Tan(α)^-1=60°

 As you can see, the angles of first triangle are: 30°,60° and 90°. 
5 0
3 years ago
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