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2 years ago

Volume of cylinder with a base radius of 5 and height of 3

Mathematics

1 answer:

Anna007 [38]2 years ago

6 0

Answer:

235.5.

Step-by-step explanation:

VOLUME: THE AMOUNT OF SPACE OCCUPIED BY A 3D OBJECT.

The formula for volume of a cylinder is:

$pi*r^2*h (3.14 * radius *radius * height)$

The radius of this cylinder is 5 and the height is 3.

Now, we can plug the numbers in the formula.

SOLVE:

$pi *5^2*3(3.14*5*5*3)=235.5.$

The product of the equation is 235.5.

I, therefore, believe the volume of this cylinder is 235.5.

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A digital scale reports a 10kg weight as weighing 8.975kg. which of the following is true?

lukranit [14]

That question is accompanied by these answer choices:

A. The scale is accurate but not precise.
B. The scale is precise but not accurate.
C. The scale is neither precise nor accurate.
D. The scale is both accurate and precise.

Then you need to distinguish between accuracy and precision.

Accuracy refers to the closeness of the measure to the real value, while precision, in this case, refers to the level of significant figures that the sacle report.

The fact that the scale reports the number with 4 significant figures means that it is very precise, but the fact that the result is not so close to the real value as the number of significan figures pretend to be, means that the scale is not accurate.

So, the answer is that the scale is precise but not accurate (the option B).

6 0

3 years ago

Super Dave Osborne stands at the bottom of a canyon elevation 256 feet below sea level, he throws a piano up at a velocity of 3

fgiga [73]

Answer:

The piano was in the air for 18.34 seconds.

Step-by-step explanation:

The height of the piano after t seconds is given by the following equation:

$f(t) = -16t^{2} + 320t - 256$

Initially, the piano is below the ground level. At the first root of the equation, it will go into the air, and then some time after that it will fall down again, which is at the second root of the equation.

Roots of a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

In this question:

$f(t) = -16t^{2} + 320t - 256$

$a = -16, b = 320, c = -256$

$\bigtriangleup = (320)^{2} - 4*(-16)*(-256) = 86016$

$t_{1} = \frac{-320 + \sqrt{86016}}{2*(-16)} = 0.8348$

$t_{2} = \frac{-320 - \sqrt{86016}}{2*(-16)} = 19.17$

Subtracting:

19.17 - 0.8348 = 18.34

The piano was in the air for 18.34 seconds.

6 0

3 years ago

Max eats 1 and 1/2 cups of food at each meal, and Fido eats 3/4 cups of food at each meal. If Omar feeds his dogs twice a day ho

liq [111]

Answer:

4.5 cups for max and 1.5 cups for fido. who the heck is omar???

Step-by-step explanation:

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2 years ago

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Mkey [24]

Answer:

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2 years ago

The axis of symmetry for the graph of the function f(x) = 3x2 + bx + 4 is x = . What is the value of b?

photoshop1234 [79]

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3 years ago

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