If 0 is the radian measure of a central angle of a circle and r is the radius of the circle, which is the correct derivation of the area, A, of the sector bounded by the sides of the central angle and the arc it subtends?

Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?