Suppose that f(1) = 4, f(4) = 9, f '(1) = 6, f '(4) = 3, and f '' is continuous. Find the value of 4 xf ''(x) dx 1.

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Extra points! find the missing dimension! need asap