A student builds a model of a high-rise for a diorama for an architecture class. The model is a perfect cube and the total volum
e is 500 cubic centimeters. How long is one side of the high-rise building? (Recall that the volume of a cube is calculated by l3 , where l is the length of one side).
Volume of the cube (V) = 500cm^3 V = side/length (l)^3 --> so length of one side (l) = cube root (cr) of 500cm^3 This can be done on a calculator by using 500^(1/3), since fractional exponents represent roots: l = crV = cr500cm^3 = 7.937 = 7.94 cm * you can verify this by cubing 7.94 --> 7.94^3 = ~500
7 out of 10 were carrying a backpack...and 3 out of 10 were not that means 7/10 of the total students had backpacks and 3/10 of the total students did not
7/10 * 700 = 4900/10 = 490 had backpacks <== 3/10 * 700 = 2100/10 = 210 did not
