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ValentinkaMS [17]
1 year ago
12

Pls answer clearly , just the answer i dont need explenation:) please <3

Mathematics
1 answer:
lawyer [7]1 year ago
5 0

Answer:

option D

Step-by-step explanation:

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Find the dimensions of a closed right circular cylindrical can of smallest surface area whose volume is 128pi cm^3
Ratling [72]
The surface area of a cylindrical can is equal to the sum of the area of two circles and the body of the cylinder: 2πr2 + 2πrh. volume is equal to π<span>r2h.

V = </span>π<span>r2h = 128 pi
r2h = 128 
h = 128/r2

A = </span><span>2πr2 + 2πrh
</span>A = 2πr2 + 2πr*(<span>128/r2)
</span>A = 2πr2 + 256 <span>π / r
</span><span>
the optimum dimensions is determined by taking the first derivative and equating to zero.

dA = 4 </span>πr - 256 <span>π /r2 = 0
r = 4 cm
h = 8 cm
</span><span>

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4 0
2 years ago
9. Find the dimensions of the<br>4 triangular faces of the pyramid.<br>(Height is 55.5 ft)<br>​
Minchanka [31]

Answer:

Q=\frac{\pi}{2}*55.5ft=87.18ft\\P=87.18ft*\sqrt{\frac{1}{2}+\frac{16}{\pi ^{2}}}=87.18*0.9515=82.95ft\\

Step-by-step explanation:

We have a 4-sided triangular pyramid , where

Q=\frac{\pi}{2}*H\\P=Q*\sqrt{\frac{1}{2}+\frac{4}{\pi ^{2}}}\\Q=\frac{\pi}{2}*55.5ft=87.18ft\\P=87.18ft*\sqrt{\frac{1}{2}+\frac{16}{\pi ^{2}}}=87.18*0.9515=82.95ft\\

3 0
3 years ago
Net income is equal to the total revenue from selling an item minus the cost of producing the item. Determine the net income if
Travka [436]
C-Cost because it the most reasonableness one
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Select the term that best describes the statement A triangle is acute provided all the angles have a measure of less than 90 deg
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I think the correct answer is conjunction...
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3 years ago
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A train travels at a constant speed of 35 feet per second. How many minutes will it take the train to travel exactly 70 miles? (
olga_2 [115]

176 minutes,

70x5,280= 369,600 divide by 35= 10,560 divide by 60=176

3 0
3 years ago
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