If 15 is 25% of a value, what is that value?

What are the domain and range of the function? f(x) = -4 (sqrt)x

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).

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.