Due to temporary tax cuts in 2010, persons in the u. s. who earned $50,000 per year had a lower tax rate. on average, these persons retained 2% more of their income than before the cuts, due to the lower rate. the 2010 law also gave the same persons a separate $850 credit on their federal tax return, which means they were allowed to subtract $850 from the amount of taxes they owed. how much extra money did a typical person earning $50,000 receive due to the tax cuts?

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

Find the derivative of the function

The sales tax for an item was $8.40 and it cost $420 before tax. find the sales tax rate. write your answer as a percentage.