Tutors Answer Your Questions about Surface-area (FREE)
Question 417454: I was given a project to take a rectangular prism (like a cereal box)and get all the dimensions(length width height). we did that. now we have to make our own cereal box. they are asking us to maximize the volume while minimizing the surface area. we can not figure out how to do this.
the original box- length 7.75 - width 5.5 - height 10.75
volume is 458.22 - surface area is 370.13 - surface area to volume ratio is 0.81
we have done all the work we just need to know how to increase the volume while decreasing the surface area.
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 420728: Please help me solve this word problem!!!
Surface Area of a Sphere. The surface area of a
sphere with radius r is 4 pi r sqared. Write a polynomial that
gives the surface area of a sphere with radius x + 2
Leave your answer in terms of pi. ???
This is what I came up with, but am not sure.
4(pi)(x + 2)squared
4pi (x sqrd. + 4)
4pixsqrd. + 16
not sure how to make the pi symbol or the squared symbol so spelled it out.
Any assistance would be greatly appreciated. :-}
Click here to see answer by Alan3354(69443)  |
Question 421354: A dog owner has 250ft of fencing to enclose a rectangular run area for his dog. If he wants the maximun possible ares, what should the length and width of the rectangle be?
i did 2x+2z=250 then got the equation 2z=250-2x using -b/2a i got -250/-4=62.5=x
then 2z=250-2(62.5) and got z =62.5 which would mean each side is 62.5 and that checks out because 62.5*4=250 but how do i know thats the maximun area and also thats a square since all sides are equal?
can anyone please please tell me what i did wrong or what i need to do?
thank you!!
Click here to see answer by Alan3354(69443)  |
Question 424940: How do you solve for the area of a shaded region? I have an unshaded circle within a shaded circle. The formula I was given is pi r squared. The numbers given are in the two circles inside the shaded region each have a diameter of 3 and the shaded region is twelve. I tried squaring them and then subtracting. (it says to subtract the shaded region)
Click here to see answer by stanbon(75887) |
|
Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840
|