In order to find out if there is enough paint for the surface area of the sphere, you need to first find the radius of the object so you can determine the measure of the entire surface area. Since they give us the volume, we can use that to solve for the radius using the volume formula: V = πr³ or 66840.28 = πr³. Using inverse operations, you can first multiply both sides of the equation by the reciprocal of 4/3 or 3/4, then divide by π, this gives you 15,965 = r³. In order to find 'r', take the cube root of both sides: ∛15965 = ∛r³ or r ≈ 25.

Now that you know radius = 25, you can use the formula for surface area: SA = 4πr² or 4π(25)² ≈ 7850 ft². Since one gallon of paint covers 400 square feet, we can take our total and divide by 400 to find the number of gallons: 7850 ÷ 400 ≈ 19.6. In total, we would need 19.6 gallons of paint for the water tower, so if there are 25 gallons available, there is enough.

3 0

3 years ago

BRIDGE CONSTRUCTION

goblinko [34]

Answer:

with these characteristics, place the

semi-ellipse on coordinate axes in a convenient position and draw it.

5. What is the equation of the ellipse? How wide will the canal need to be for the

Petroleum ship?

6. Now that you know which of the two alternatives provides the widest channel, consider other

factors. His department is also in charge of verifying the depth of the channel, the

amount of river traffic and other details. For example, if there was a flood in the river and

the water level will rise 10 feet, how would free space be affected? Take a decision

about which project you think would be best as far as your department is concerned and

6 0

3 years ago