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3 years ago

Who was the first multi-millionaire

Mathematics

2 answers:

ad-work [718]3 years ago

7 0

Answer:

John Jacob Astor

Step-by-step explanation:

Hope this helps!

hichkok12 [17]3 years ago

6 0

Answer:

John Jacob Astor..............

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the area of a pentagon increased by 27 is the same as four times the difference of area and 15. what is the area of the pentagon

AfilCa [17]

This can be written as:
a+27=4(15-a)
now to work it out
a+27=4(15-a)
a+27=60-4a
4a+27=60
4a=33
a=8.25

hope this helps :)

6 0

3 years ago

What is x, if the volume of the cylinder is 768pi rcm3?

AVprozaik [17]

let's recall Cavalieri's Principle, solids with equal altitudes and cross-sectional areas at each height have the same volume, so even though this cylinder is slanted with a height = x and a radius = 8, the cross-sectional areas from the bottom to top are the same thickness and thus the same area, so its volume will be the same as a cylinder with the same height and radius that is not slanted.

$\bf \textit{volume of a cylinder}\\\\ V=\pi r^2 h~~ \begin{cases} r=radius\\ h=height\\ \cline{1-1} r=8\\ h=x\\ V=768\pi \end{cases}\implies 768\pi =\pi (8)^2(x)\implies 768\pi =64\pi x \\\\\\ \cfrac{768\pi }{64\pi }=x\implies 12=x$

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3 years ago

What is the derivative of f(x) = x(6^-2x)

Bas_tet [7]

Step-by-step explanation:

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3 years ago

Please help to solve this. Find sin5x,if sinx+cosx=1,4

MrMuchimi

Answer:

Hello,

Step-by-step explanation:

we must first remember that:

$\boxed{sin(5x)=5sin(x)-20*sin^3(x)+16*sin^5(x)}\\\\$

Let say t=sin(x)

$sin(x)+cos(x)=1.4\\\\t+\sqrt{1-t^2}=1.4\\\sqrt{1-t^2}=1.4-t\ we\ square\\1-t^2=1.4^2+t^2-2.8*t\\2t^2-2.8*t+0.96=0\\\Delta=2.8^2-4*2*0.96=0.16=0.4^2\\\\t=\dfrac{2.8-0.4}{4} =0.6\ or\ t=\dfrac{2.8+0.4}{4}=0.8\\\\t^3=0,216\ or\ t^3=0,512\\\\t^5=0,07776\ or\ t^5=0,32768\\\\\boxed{sin(5x)=5*0.6-20*0.216+16*0.07776=-0,07584}\\\\or\\\\\boxed{sin(5x)=5*0.8-20*0.512+16*0.32768=-0,99712}$

8 0

3 years ago

the slope of the line below is 3. write the point-slope equation for the line using the coordinates of the labeled point.

umka21 [38]

Answer:

y - 8 = 3(x - 6)

Step-by-step explanation:

The standard point slope formula for the equation of a circle is

y - h = m(x - k)

Here, h = 6, k = 8 and m = 3. Then we have:

y - 8 = 3(x - 6)

7 0

3 years ago

Who was the first multi-millionaire ​

Who was the first multi-millionaire