The profit in dollars from the sale of x expensive watches is P(x)=0.07x^2 – 4x + 5x^0.8 – 5100. Find the marginal profit when (a) x=400, (b) x=1000 (c) x=6000, and (d) x=12000

Which expression is equivalent to 4 square root 6 divided by 3 root 2

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?