Ross sells computers. he earns 6% of his sales in commission each month. in the past 4 months, ross had the following sales: $4000, $5200, $5500, $4900. find a reasonable range for his commissions during these months.

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.