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otez555 [7]
3 years ago
15

In what base is the sum of 8 and 5 equal to 14?

Mathematics
1 answer:
LuckyWell [14K]3 years ago
4 0
Nothing. It would have to be 5 and 8 to be 13... Not 14 and it would be math. :)
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If 1200 cm^2 of material is available to make a box with a square base and an open top find the largest possible volume of the b
strojnjashka [21]
Surface area of box=1200 cm² 
<span>Volume of box=s²h </span>
<span>s = side of square base </span>
<span>h = height of box </span>
<span>S.A. = s² + 4sh </span>
<span>S.A. = surface area or 1200 cm², s²
 = the square base, and 4sh = the four 'walls' of the box. </span>
<span>1200 = s² + 4sh </span>
<span>1200 - s² = 4sh </span>
<span>(1200 - s²)/(4s) = h </span>


<span>v(s) = s²((1200 - s²)/(4s)) </span>
<span>v(s) = s(1200 - s²)/4 . </span>
<span>v(s) = 300s - (1/4)s^3</span>

by derivating
<span>v'(s) = 300 - (3/4)s² </span>
<span>0 = 300 - (3/4)s² </span>
<span>-300 = (-3/4)s² </span>
<span>400 = s² </span>
<span>s = -20 and 20. </span>
again derivating
<span>v"(s) = -(3/2)s </span>
<span>v"(-20) = -(3/2)(-20) </span>
<span>v"(-20) = 30 </span>
<span>v"(20) = -(3/2)(20) </span>
<span>v"(20) = -30 </span>


<span>v(s) = 300s - (1/4)s^3 </span>
<span>v(s) = 300(20) - (1/4)(20)^3 </span>
<span>v(s) = 6000 - (1/4)(8000) </span>
<span>v = 6000 - 2000 
v=4000</span>
4 0
3 years ago
The formula for the area of a trapezoid with altitude k and bases m and n is . A=k/2 (m+n) solve for m..
SashulF [63]

Answer:

m=A\times\frac{2}{k}-n

Step-by-step explanation:

Given : The formula for the area of a trapezoid with altitude k and bases m and n is A=\frac{k}{2}(m+n)

We have solve for m .

Consider the given formula  A=\frac{k}{2}(m+n)

Multiply both side by \frac{2}{k}, we have,

A\times\frac{2}{k}=m+n

Now subtract n both side, we have,

A\times\frac{2}{k}-n=m

Thus, m=A\times\frac{2}{k}-n

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Formula:
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