A circle has a diameter of 15 cm. Find the circumference. . Use 3.14 for π. Round your answer to the nearest tenth. PLEASE HELP!
2 answers:
Answer:
Step-by-step explanation:
The circumference of a circle is the perimeter or the distance around the circle. It is calculated using the following formula:
The diameter of the circle is 15 centimeters. We are asked to use 3.14 for pi.
- d= 15 cm
- π = 3.14
Substitute the values into the formula.
Multiply.
This number only has numbers in the tenth place, so we don't need to round.
The circumference of the circle is <u>47.1 centimeters.</u>
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Answer:
16π
Step-by-step explanation:
Given:
<u>Formula:</u>
Replace the radius in the formula:
Evaluate the area:
Since the question says to determine the area in terms of π, the final answer is 16π.
Volume of Solids
The volume of the solid is 758.83 in³
Step-by-step explanation:
Given that the cone and half sphere is hollow
The volume of the cone =
The Volume of the sphere =
So the Volume of the half sphere =
The volume of solid = volume of cone + volume of the half sphere
Given
height h = 19 in
radius r = 5 in
=
= 1/3 × 3.14 × 5 × 5 × 19
= 497.16 in³
= 2/3 × 3.14 × 5 × 5 × 5
= 261.67 in³
V = 497.16 in³ + 261.67 in³
= 758.83 in³
Hence the volume of the solid is 758.83 in³