The diameter of a marble is 3/2 of an inch.How many marbles are needed to make a row of marbles 9 inches long?
456686
6 marbles. Since they stand right next to each other, the length is going to be (# of marbles) * (diameter) = 9.\n\nIf i understand the question correctly.
893271
1 inch = 2.54 cm\n\nSo 1 cm = 1/2.54 inches \n\nSo n cm = n/2.54 inches
177069
Answer:\nThere are 11 yellow marbles and 5 blue marbles.\n\nProof:\nLet "n" be the total number of marbles.\nLet "r" be the number of red marbles.\nLet "y" be the number of yellow marbles.\nLet "b" be the number of blue marbles.\nWe are told that the total number of marbles is 30:\nn = 30\nwe are told that there are 14 red marbles:\nr = 14\nand we are told that there are 6 fewer blue marbles than yellow marbles:\nb = y-6\n\nTherefore\nn = r + y + b\n30 = 14 + y + b\n30 - 14 = y + b\n16 = y + b\n16 = y + (y-6) (Express b as a function of y)\n16 = 2y - 6\n22 = 2y\n11 = y\n\nNow solve for b:\nb = (y-6) = 11-6 = 5
1073502
Once again you will see that this is a rectangle.\nA = length times width\nA = 7*2\nA = 14
237156
Pi * r^2\n\n(Pi R Squared)\n\nwhere R is the radius (which is also equivalent to half the diameter)
363291
Well, now dummy, let's think this one through.  First, let's divide the sucker by 12 and see what we get.\n\n495.923 / 12 = 41.3296 feet\n\nSo, we see it is 41 feet plus a tad more, almost a third of a foot as a matter of fact.\n\nNow how many inches is .3296 foot?\n\nWell, 1 inch divided by 12 = 0.0833, so each inch is .0833 of a foot.\n\nSo, .3296 / .0833 = 3.95 inches\n\nNow we have it narrowed down to 41 feet, 3.95 inches.\n\nYou should realize that 95/100 of an inch would be 19/20.\n\nSo if you want all fractions it is 41 feet 3 and 19/20 inches.\nThis is the same as 41 feet 3.95 inches\n\nThere is probably an easier way to figure this out but I just go through things logically.  You could figure this out too if you didn't spend so much time playing stupid video games.
337687
There is some special using of word "diameter".\n\nThe diameter of a subset of a metric space is the least upper bound of the distances between pairs of points in the subset.\n\nIn other words, diameter of a figure is a length of an interval, both vertex of which are within the figure.\n\nIf that is what you want and you want to find a diameter of a bar with sides 1 and 11, then the answer will be sqrt(122). This is because such interval will be a bar's diagonal.\n\nAnswer: sqrt(122).
1088174
area = pi times the radius squared\n\nThe diameter is twice the radius.\n\nSo divide the diameter in two, square that and multiply by pi.
43265
do a thing with conservation of momentum. make your own newton's cradle(or use one if you already have one). you'll need 5 balls of exact equal mass(marbles would work) glue string to each one and tie the other end to a rod or stick of some sort(make sure the strings are the same length, and the balls have to be perfectly lined up and touching). find a way to get the ends of the rod to rest on something to make the balls/marbles hang down. ok, now pull one back and let it slam into the line of them. they will all stay still except for the last ball on the other end, which will fly up, come back down, and hit the row of them again. if you take two balls and pull them back, two will come off the other end. same with three, even though there are only 5 balls. the middle ball will go twice, and the ones that come back down will always stop dead once they reach their original position and the others start moving.  this is because they transfer their momentum to the other balls. the reason that the same number of balls come out the other end is that the masses have to be equal before the collision and after.  the system will not go on indefinately as it will eventually be slowed and eventually stopped by friction and air resistance.
143664
radius= diameter/2\narea=(pi)(radius)^2\n\narea of an 18 inch pizza= (pi)(9)^2= 81(pi)\narea of a 14 inch pizza= (pi)(7)^2= 49(pi)\n\ndifference= 81pi-49pi= 32pi= 100.5 square inches
919521
Imagine the center of the triangle. Draw a line segment from it to a vertex, and then one from the center to a midpoint of a side. This makes a 30-60-90 triangle, so the line segment is (p/2) sqrt(3). This is a radius of the cylinder, so we multiply it by 2 to get the diameter.\n\nd = p sqrt(3)\n\nor, as the question wants it\np = d/sqrt(3) = d sqrt(3)/3
1090243
For random packing, figure about 63-64% of the jar's volume is marbles. For optimum packing (i.e. carefully arranged marbles) you can get to 74%.
714329
Area = pi*r^2 = pi*3^2 = 9pi. Thats 28.27 square feet, approx.
1082571
2.54 centimeters make an Inch.
374444
100\n\n(10mm=1cm; 10x10=100)
579127
what is the diameter....? Just multiply the diameter times pi. (3.14)
364710
3 feet is 36 inches.\n\n0.8 feet is 8/10 of a foot. Solve 8/10 = x/12 for x, and you get 9.6 inches.\n\nSo 3.8 feet is 36 + 9.6 inches, or 45.6 inches.