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3 years ago

I’m going insane about math whoever created math I am glad is dead anyway help

Mathematics

2 answers:

SVETLANKA909090 [29]3 years ago

7 0

6,250 cubic meters

maw [93]3 years ago

5 0

Answer and Step-by-step explanation:

Since we know that this figure is a square pyramid, the base is a square. And the area of a square is its side multiplied by its side, which the sides would equal the same (since it is a square).

So, we square 625 to find One side of the square.

$\sqrt{625} = 25$

We get 25 as the side.

The volume equation for a square pyramid is:

$V = a^{2}( \frac{h}{3} )$

Where a is the side length of the base, and h is the height.

Plug in the values.

$V = (25)^{2} (\frac{30}{3} )\\\\V = 625(10)\\\\V = 6250$

The volume of the square pyramid is 6250 cubic meters.

#teamtrees #WAP (Water And Plant)

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Studies show that a typical giant hummingbird can flap its wings once in 0.08 of a second.

Licemer1 [7]

Answer:

a. 90

b. 360

Step-by-step explanation:

The time taken by humming bird to flap its wings= 0.08 sec

by flying 7.2 seconds a typical giant hummingbird flap its wings $\frac{7.2}{0.08}$ times

= 90 times

Since, A ruby-throated hummingbird can flap its wings 4 times faster than a giant hummingbird, it will flap its wings in every 0.02 sec

so in 7.2 seconds it will flap $\frac{7.2}{0.02}$ times = 360 times

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3 years ago

What is the volume of a cone that has a radius of 4 cm and a height of 9 cm?

vodka [1.7K]

For any sort of pyramid or cone, the volume is 1/3 of the volume of a prism with the same base and height. Since the volume of a prism/cylinder is $V=Bh$ , the volume of a pyramid/cone is $V=\frac{1}3Bh$ .

In this case, our base is a circle, which has a radius of 4 cm.
The area of a circle is $A=\pi r^2$ where r is the radius.
$A=\pi (4)^2=\pi (4\times4)=16\pi=B$

We now know that our base is 16π cm.
We also know that our height is 9 cm.
Let's plug these into our volume formula.

$V=\frac{1}3\times16\pi \times9$

Use 3.14 to approximate pi as the question states. 16 × 3.14 = 50.24.

$V\approx\frac{1}3\times50.24\times9$

We could punch all of that into our calculator to get the same answer, but since 1/3 of 9 is clearly 3, let's just go with that.

$V\approx3\times50.24$

$\boxed{V\approx150.72\ cm^3}$

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2 years ago

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Dominik [7]

Answer:

14,400

Step-by-step explanation:

Hope this helpfull..but if it's not,im so sorry

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2 years ago

What is the area? in square yards.

KengaRu [80]

Answer:

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Step-by-step explanation:

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3 years ago

Write the standard equation for the circle center (–6, 7), r = 9.

Advocard [28]

The standard equation for the circle centre can be written by using this formula: (x-h)² + (y -k)² = r²

So, the equation in this case is: (x+6)² + (y-7)² = 81

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2 years ago

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