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Evgen [1.6K]
3 years ago
14

The volume of a​ cone-shaped hole is 16 pi ft cubed . If the hole is 3 ft​ deep, what is the radius of the​ hole?

Mathematics
1 answer:
VashaNatasha [74]3 years ago
8 0
V = 1/3 • π • radius cubed • height

If the volume is is 16π and the height is 3, then 16π = 1/3 • π • r cubed • 3

16π ÷ (1/3 • π • 3) = 16

radius squared = 16        √16 = 4, so radius = 4

You can also check: 1/3 • r cubed • 3 = 16    The only value left to multiply is π
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When a stepladder is placed as shown, is it possible for the lower ends of the ladder to be 12 feet apart? Explain​
nataly862011 [7]

Answer:

No, with the guides in between the two ladders, it is not possible for the lower ends of the ladder to be up to 12 feet apart

Step-by-step explanation:

The given parameters are;

The length of two sides of the step ladder = 12 feet

The maximum value allowable for the included angle between the two 12 feet ladders = 58°

Therefore, the maximum value of the third side facing the included angle is given as follows;

let "a" represent the maximum value of the third side formed by the distance apart of the lower end of the ladder, by cosine rule, we have;

a² = 12² + 12² - 2 × 12 × 12 × cos(58°) = 135.383251901

∴ a = √(12² + 12² - 2 × 12 × 12 × cos(58°)) ≈ 11.64

The maximum value of the third side formed by the distance apart of the lower end of the ladder = a ≈ 11.64 feet < 12 feet

Therefore, it is not possible for the lower ends of the ladder to be up to 12 feet apart.

5 0
3 years ago
What is the zeros of function of f(x)=2x+2​
chubhunter [2.5K]

The answer is there !!!

6 0
3 years ago
Let t = cosA + sinA<br> find values of t if <br> 2 - sin2A = 2(cosA + sinA)
Zinaida [17]

2 - \sin(2A) = 2(\cos A + \sin A)\\\\2-2\sin A\cos A=2\cos A+2\sin A\\\\2\sin A\cos A+2\cos A+2\sin A-2=0\\\\1+2\sin A\cos A+2\cos A+2\sin A-3=0\\\\\sin^2 A+\cos^2 A+2\sin A\cos A+2\cos A+2\sin A-3=0\\\\(\sin A+\cos A)^2+2\cos A+2\sin A-3=0\\\\(\sin A+\cos A)^2+2(\cos A+\sin A)-3=0\\\\\\t^2+2t-3=0\\\\t^2+2t+1-4=0\\\\(t+1)^2=4\\\\t+1=2\qquad\vee \qquad t+1=-2\\\\\\\boxed{t=1\qquad\vee\qquad t=-3}

When A\in\mathbb{R}

t=\cos A+\sin A\in[-\sqrt{2};\sqrt{2}]\approx[-1.4142;1.4142]

and there is only one answer t = 1.

For A\in\mathbb{C} both values are correct.

4 0
4 years ago
Raja is making small, cone-shaped horns out of clay for an art project. Each horn is 16 centimeters tall with a base diameter of
kotykmax [81]

Answer: Raja needs 150.72 cubic centimeters for each horn.

Step-by-step explanation:

Since the horns that Raja is making are cone shaped, then we would determine the amount of clay she needs by applying the formula for

determining the volume of a cone is expressed as

Volume = 1/3πr²h

Where

h represents the height of the cone.

r represents the radius of the cone

π is a constant whose value is 3.14

From the information given,

Height = 16 centimeters

Diameter = 6 centimeters

Radius = diameter/2 = 6/2 = 3 centimeters

Therefore,

Volume = 1/3 × 3.14 × 3² × 16 = 150.72 cubic centimeters

5 0
4 years ago
5p + 3 = 15
kolbaska11 [484]

Answer:

Janet has three dollars. She decides to start saving money for five months. She wants to have a total amount of fifteen dollars at the end of the five-month period. How much money should Janet save per month?

She starts with three, and p is the amount of money she needs to save per month, and at the end of the period, she should have saved a total of fifteen dollars. In order to solve it, you must find what 12 divided by 5 is and write it as an amount of money. The answer is $2.40 or 2.4.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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