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4 years ago

What's the area of this....thing?

Mathematics

2 answers:

max2010maxim [7]4 years ago

6 0

Area of a triangle=bh/2, area of a square is side squared

a=7x4=28/2=14, and since there are 3 triangles multiply and get 42
a=7x7=49
42+49=91

soldier1979 [14.2K]4 years ago

3 0

Gotcha.

So to find the triangles it's going to be 7*4 which is 28 then divide it by 2.
This is 14, so the area of one half, of the bigger triangle is 14, then add 14 6 times or just times it by 6. Which is 84.

Now find the area of the square which is 7*7 and that's 49. So add 84 and 49 and that's your answer.

Which means it's 133 :)

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3 years ago

Read 2 more answers

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Paladinen [302]

The solid shape is a cone and a half sphere. So the equation would be (cone volume) + (1/2 sphere volume):
$cone = \frac{1}{3} \pi {r}^{2} h \\ sphere = \frac{4}{3} \pi {r}^{3} \\ object = ( \frac{1}{3} \pi {r}^{2} h) + \frac{1}{2} ( \frac{4}{3} \pi {r}^{3} )$
If the volume of the cone is 270pi and the height of the cone is 10, then:
$270\pi = \frac{1}{3} \pi {r}^{2} (10) \\ 27 = \frac{1}{3} {r}^{2} \\ 80 = {r}^{2} \\ r = 9$
The radius of the object is 9 cm. Therefore, we can plug into the formula for the total volume:
$object = 270\pi + \frac{1}{2} ( \frac{4}{3} \pi {(9)}^{3} ) \\ = 270\pi + \frac{2}{3} (729\pi) \\ = 270\pi \: + 243\pi \\ = 513\pi$
The total volume is 513 pi cm^3

7 0

3 years ago

The iris is the colored part of your eye. What is the main function of your iris?

IgorC [24]

C) Muscles in the iris control the amount of light that enters the eye

4 0

3 years ago

How many liters of a 35% salt solution must be mixed with 20 liters of 70% salt solution to obtain a solution that is 45% salt?

Tomtit [17]

Answer:

.35 x + .70 (20) = .45(x+20)

50=x

Step-by-step explanation:

Let x = liters of 35% salt solution

We have 20 liters of 70%

We have a total of 20+x liters of 45%

.35 x + .70 (20) = .45(x+20)

Distribute

.35x + 14 = .45x +9

Subtract .35x from each side

14 = .10x +9

Subtract 9 from each side

5 = .10x

Divide each side by .1

5/.1 = x

50=x

3 0

4 years ago

Can someone plz help with this question idk how to do it im stooopid

V125BC [204]

Answer: 96 square units (choice B)

==============================================

Explanation:

Triangle OBI has a base of OI = 12 units along the horizontal component, and CB = 8 is the vertical component or the height.

area of triangle OBI = 0.5*base*height

area of triangle OBI = 0.5*12*8

area of triangle OBI = 48 square units

--------------------------------------

Now find the area of the trapezoid GNIO. The two horizontal components are the parallel bases GN = 4 and OI = 12. The height of this trapezoid is the vertical component CD = 6, where point D is added on to be at location (0,-6) on the graph.

area of trapezoid = (height*(base1+base2))/2

area of trapezoid GNIO = 6*(4+12)/2

area of trapezoid GNIO = 48

Coincidentally, the triangle and trapezoid both have the same area

--------------------------------------

The last thing to do is add the two areas of the triangle and trapezoid

total area = (area of triangle OBI) + (area of trapezoid GNIO)

total area = (48) + (48)

total area = 96 square units

8 0

3 years ago