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Virty [35]
2 years ago
5

I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER

Mathematics
2 answers:
kherson [118]2 years ago
7 0
1137.225 is the answe
Olenka [21]2 years ago
5 0

Answer:

Pentagon consists of 5 congruent

triangles. calculate the area of one

triangle.

A..area

b..base

a....apothem

A=1/2ba

A=1/2×25.7×17.7

A=227.45

Multiply the area by 5 to get the area of

the pentagon.

A= 227.45 x 5

A = 1137.23cm²

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kenny6666 [7]
Would you please elaborate on what you would like to know?
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3 years ago
Halla 0,3% de 5000 porfavooorr ayudaaaaaa
RUDIKE [14]

Answer:

15

Step-by-step explanation:

0.3% of 5000

= (0.3/100) x 5000

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5 0
3 years ago
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sattari [20]

Answer:

Elena could tell without finishing by simplifying both sides. The next step would have been 30x +24x = 30x+24. This would have been simplified down to x=1

Step-by-step explanation:

6 0
2 years ago
How do I do question 9? Please give answer thank you
kvasek [131]
<h3>Given</h3>
  • a cone of height 0.4 m and diameter 0.3 m
  • filling at the rate 0.004 m³/s
  • fill height of 0.2 m at the time of interest
<h3>Find</h3>
  • the rate of change of fill height at the time of interest
<h3>Solution</h3>

The cone is filled to half its depth at the time of interest, so the surface area of the filled portion will be (1/2)² times the surface area of the top of the cone. The filled portion has an area of

... A = (1/4)(π/4)d² = (π/16)(0.3 m)² = 0.09π/16 m²

This area multiplied by the rate of change of fill height (dh/dt) will give the rate of change of volume.

... (0.09π/16 m²)×dh/dt = dV/dt = 0.004 m³/s

Dividing by the coefficient of dh/dt, we get

... dh/dt = 0.004·16/(0.09π) m/s

... dh/dt = 32/(45π) m/s ≈ 0.22635 m/s

_____

You can also write an equation for the filled volume in terms of the filled height, then differentiate and solve for dh/dt. When you do, you find the relation between rates of change of height and area are as described above. We have taken a "shortcut" based on the knowledge gained from solving it this way. (No arithmetic operations are saved. We only avoid the process of taking the derivative.)

Note that the cone dimensions mean the radius is 3/8 of the height.

V = (1/3)πr²h = (1/3)π(3/8·h)²·h = 3π/64·h³

dV/dt = 9π/64·h²·dh/dt

.004 = 9π/64·0.2²·dh/dt . . . substitute the given values

dh/dt = .004·64/(.04·9·π) = 32/(45π)

7 0
3 years ago
B) 4364 * 1001 - 4364 (Ans 4364000)<br><br><br>Give the answer ​
maks197457 [2]

Answer:

  • 4364000

Step-by-step explanation:

  • 4364 * 1001 - 4364 * 1 =
  • 4364 * (1001 - 1) =
  • 4364 * 1000 =
  • 4364000
8 0
3 years ago
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