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skad [1K]
3 years ago
8

Find the volume v of the described solid s. a frustum of a pyramid with square base of side b, square top of side a, and height

h
Mathematics
1 answer:
Pachacha [2.7K]3 years ago
6 0
Use the general formula:

Volume = Height * (area of top+4*area at mid height+area at bottom) /6

Example for a cube of side s:
Vcu=s(s^2+4s^2+s^2)/6=s^3

Example for a cone of radius r
Vco=h(0+4*pi r^2/4+pi r^2)/6=pi r^2 h/3

Example for a sphere or radius r:
Vsph=2r*(0+4pi r^2 + 0)/6 = 4pi r^2 /3

So for a square frustrum with end sides a & b, height h:
Vf=h*(a^2+4((a+b)/2)^2+b^2)/6=(a^2+(a+b)^2+b^2)h/6
or simply
Vf=(a^2+(a+b)^2+b^2)h/6


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Let f(x) = 3x+5 and g(x) = x^2. Find g(x)/f(x) and state its domain
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Answer:

1/x-2; domain is the set of all real numbers except 2

Step-by-step explanation:

7 0
3 years ago
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Work out the angle of elevation from the
insens350 [35]

\quad \huge \quad \quad \boxed{ \tt \:Answer }

\qquad \tt \rightarrow \:Angle \:\: of \:\: elevation= 30°

____________________________________

\large \tt Solution  \: :

Let the angle of elevation be " x "

\qquad \tt \rightarrow \:  \cos(x)  =  \dfrac{9 \sqrt{3} }{18}

\qquad \tt \rightarrow \:  \cos(x)  =  \dfrac{ \sqrt{3} }{2}

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\qquad \tt \rightarrow \: x = 30 \degree \:  \:  or \:  \:  \cfrac{ \pi}{6}   \:  \: rad

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

8 0
2 years ago
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WORTH 19 POINTS!!
marta [7]
You have to make a cos graph that starts its minimum and of -2, has an amplitude of 10, a period of 10 and  a maximum of 18.
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lets start of with a regular cos(x) graph.  This starts on its maximum instead of minimum so we have to multiply it by -1 to get -cos(x) which does start on its minimum.

-cos(x) has an amplitude of 1 instead of 10, to fix that we multiply it by 10 to get -10cos(x) which has an amplitude of 10.
 
-10cos(x) has a period of 2π instead of 10, to fix this we multiply the x by 2π/10 to get -10cos((π/5)x) which now has a period of 10.

-10cos((π/5)x) has a minimum of -10 and maximum of 10 instead of a minimum of -2 and maximum of 18, to fix this we add 8 to -10cos((π/5)x) to get -10cos((π/5)x)+8 which does have a minimum of -2 and maximum of 18.

Therefore the answer is y=-10cos((π/5)x)+8. x being time in minutes and and y being the height in feet.  

I hope this helps.  Let me know if anything is unclear.
8 0
3 years ago
The rosebud flower shop has a basic delivery charge of $5 plus a rate of 25 cents per mile. The Beautiful Bouquets flower shop h
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3 years ago
Can someone explain how to find the answer to x​
OLga [1]

Answer:

130

Step-by-step explanation:

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y=130

x and y = the  same thing so 130 is the value of x

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