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2 years ago

ILL GIVE YOU BRAINLYIST

Mathematics

2 answers:

Vladimir79 [104]2 years ago

7 0

Explanation:

If it's the top numbers, it's 55 degrees.

Bottom is 125 degree angle.

lidiya [134]2 years ago

4 0

I agree as well the top is 55 degrees and the bottom is 125 degrees have a great day

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Gravel is being dumped from a conveyor belt at a rate of 20 ft3 /min and its coarseness is such that it forms a pile in the shap

pantera1 [17]

Answer:

The height of the pile is increasing at the rate of $\mathbf{ \dfrac{20}{56.25 \pi} \ \ \ \ \ ft/min}$

Step-by-step explanation:

Given that :

Gravel is being dumped from a conveyor belt at a rate of 20 ft³ /min

i.e $\dfrac{dV}{dt}= 20 \ ft^3/min$

we know that radius r is always twice the diameter d

i.e d = 2r

Given that :

the shape of a cone whose base diameter and height are always equal.

then d = h = 2r

h = 2r

r = h/2

The volume of a cone can be given by the formula:

$V = \dfrac{\pi r^2 h}{3}$

$V = \dfrac{\pi (h/2)^2 h}{3}$

$V = \dfrac{1}{12} \pi h^3$

$V = \dfrac{ \pi h^3}{12}$

Taking the differentiation of volume V with respect to time t; we have:

$\dfrac{dV}{dt }= (\dfrac{d}{dh}(\dfrac{\pi h^3}{12})) \times \dfrac{dh}{dt}$

$\dfrac{dV}{dt }= (\dfrac{\pi h^2}{4} ) \times \dfrac{dh}{dt}$

we know that:

$\dfrac{dV}{dt}= 20 \ ft^3/min$

So;we have:

$20= (\dfrac{\pi (15)^2}{4} ) \times \dfrac{dh}{dt}$

$20= 56.25 \pi \times \dfrac{dh}{dt}$

$\mathbf{\dfrac{dh}{dt}= \dfrac{20}{56.25 \pi} \ \ \ \ \ ft/min}$

The height of the pile is increasing at the rate of $\mathbf{ \dfrac{20}{56.25 \pi} \ \ \ \ \ ft/min}$

8 0

3 years ago

You know that the sum of -5 and another integer is a positive integer. What can you conclude about the sign sign of the other in

kirill115 [55]

I can conclude that the sign of the other integer is positive and that the other integer is 6 or greater.

I tried explaining it, but failed miserably. I'm so sorry! :(

3 0

3 years ago

Read 2 more answers

NEED HELP QUICK PLEASE HELP

muminat

Answer:135

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

Plz help I will mark you brainlist plz hellp

Ilya [14]

Answer:Probability = 1/8.

Step-by-step explanation:

A number cube has six sides. Each side has a number from 1 to 6. This means that there are 3 even numbers (2, 4, and 6) and 3 odd numbers (1, 3, and 5). Therefore:

P(number cube lands on an even number after roll) = Number of even numbers/Number of total numbers. = 3/6 = 1/2.

Since the cube has to be rolled three times, the probability will be multiplied 3 times (assuming that each roll in independent of each other). Therefore:

P(number cube lands on an even number 3 times after roll) = 1/2 * 1/2 * 1/2 = 1/8.

Therefore, the answer is 1/8!!!

6 0

3 years ago

Multiply (x + 1);<br> x + 1<br> 3+ + 2x+2<br> x +x+1<br> 2+2x+1

nika2105 [10]

Answer:

HI!!! I believe your answer is option a because it looks like your not multiplying anything so hope this helps:)

Step-by-step explanation:

7 0

3 years ago