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3 years ago

Please help!! Find the area please! Greatly appreciated if you do.

Mathematics

1 answer:

andriy [413]3 years ago

4 0

I think 55, I hope this is right

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An inverted pyramid is being filled with water at a constant rate of 25 cubic centimeters per second. The pyramid, at the top, h

UNO [17]

Answer:

$\frac{225}{16} cm/s$

Step-by-step explanation:

We are given that

$\frac{dV}{dt}=25cm^3/s$

Side of base=4 cm

l=w=4 cm

Height,h=12 cm

We have to find the rate at which the water level rising when the water level is 4 cm.

Volume of pyramid= $\frac{1}{3}lwh=\frac{1}{3}l^2h$

$\frac{l}{h}=\frac{4}{12}=\frac{1}{3}$

$l=\frac{1}{3}h$

Substitute the value

$V=\frac{1}{27}h^3$

Differentiate w.r.t t

$\frac{dV}{dt}=\frac{3}{27}h^2\frac{dh}{dt}$

Substitute the values

$25=\frac{1}{9}(4^2)\frac{dh}{dt}$

$\frac{dh}{dt}=\frac{25\times 9}{16}=\frac{225}{16} cm/s$

5 0

3 years ago

What value of x makes the equation -5x - (-7 - 4x) = -2(3x - 4) tru

Aloiza [94]

Answer: 1/10 or 0.1

Step-by-step explanation:

-(-7 - 4x) = -2(3x - 4)

7 + 4x = -6x + 8

* subtract 7 from both sides

4x = -6x + 1

* Add 6x to both sides

10 x = 1

* Divide both sides by 10

x = 1/10 or 0.10

8 0

2 years ago

Read 2 more answers

Identify the scale factor <br> Photograph: height 3 in. <br> Painting: height 24 in.

Finger [1]

Answer:

Step-by-step explanation:

The new height is 24

The original height is 3

24/3 is 8

The scale factor is 8

6 0

3 years ago

Which equation below has no solution?

soldier1979 [14.2K]

Answer:

Step-by-step explanation:

8 0

2 years ago

In a dance competition, a participant has to score a total of at least 30 points in the first four rounds combined to move on to

Anvisha [2.4K]

Answer:

5 + 3p ≥ 30

Step-by-step explanation:

"at least" means greater than are equal to. ≥

So we already know he has 5 points, but the other 3 rounds we don't. 5 + 3p

30 is the overall points he has.

5 + 3p ≥ 30

4 0

2 years ago