Estimate the area under the graph of f(x) = 5/x from x = 1 to x = 5 using four approximating rectangles and right endpoints. I entered 6.41667, but it was marked incorrect. Any help would be greatly appreciated!

Triangle xyz has vertices x(1,3), y(0,0)

Ahigh-altitude spherical weather balloon expands as it rises, due to the drop in atmospheric pressure. suppose that the radius r increases at the rate of 0.02 inches per second, and that r = 36 inches at time t = 0. determine the equation that models the volume v of the balloon at time t, and find the volume when t = 360 seconds. v(t) = 4π(0.02t)2; 651.44 in3 v(t) = 4π(36 + 0.02t)2; 1,694,397.14 in3 v(t) = four pi times the product of zero point zero two and t to the third power divided by three.; 4,690.37 in3 v(t) = four pi times the quantity of thirty six plus zero point zero two t to the third power divided by three.; 337,706.83 in3

24m^2n+30mn^2+18mn, a sweet challenge!