Solve the following proportion? w/6 = 6/9

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax