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4 years ago

A square piece of cardboard with each side 30 inches long hasa

Mathematics

1 answer:

Murljashka [212]4 years ago

7 0

Answer: 5 inches

Step-by-step explanation:

V = S * (30-2S)^2

V = S(900-120s+4s^2)

Volume = 4s^3 -120s^2 +900s

Find local maximum from graph at 5 (or take derivative = 0)

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Find the difference.

Scorpion4ik [409]

Answer:

Is that the letter (x) or Is that times?

If it is times; then the difference is:

Option "C" -12x2-x-7

Step-by-step explanation:

why, because it is not solvable

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3 years ago

Tamara has a piece of card that is blue on one side and white on the other.She cuts out the shape from the card.She turns over t

saveliy_v [14]

Answer:o

Step-by-step explanation:

becuse if you felp it you the aswer

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3 years ago

Read 2 more answers

Please help ive been stuck in this question

kondaur [170]

Answer:

The choice A.

Step-by-step explanation:

sin= Opposite/ hypotenuse

$\sin(30) = \frac{ \sqrt{15} }{x} \\ \\ x = 2 \sqrt{15}$

tan = opposite/adjacent

$\tan(30) = \frac{ \sqrt{15} }{y} \\ \\ y = 3 \sqrt{5}$

I hope I helped you^_^

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3 years ago

Find the lateral area and the surface area of the right prism.

liraira [26]

Answer:

390 $in^{2}$

Step-by-step explanation:

We know that the top is a rectangle triangle, we only have two of the tree sides and the one that is missing is the hypotenuse. The formula to find it is $h^{2}= a^{2} +b^{2}$

If we put the values we know it would be

$h^{2}= 5^{2} +12^{2}$

$h^{2}= 25 +144$

$h^{2}= 169$

$h=\sqrt{169}$ = 13

So now we have the lenght missing.

The area of the top and bottom is the same and we found it by the formula $\frac{(base)(height)}{2}$ = $\frac{(12)(5)}{2}$ = 30, that is the area of just one triangle, multiply by 2 and that is the area of top and bottom = 30 x 2 = 60