(See Example 5) Maradee works at Cox’s Jewelers for $7.50 per hour with time-and-a-h...

(See Example 5) Maradee works at Cox’s Jewelers for $7.50 per hour with time-and-a-half for all hours over 40 in a week. Thus, her weekly salary is given by

S(h) = 11.25h + 300

where h is the number of overtime hours and S(h) is her weekly salary.

(a) Find S(2.5).

(b) One week, Maradee worked 45 hours. Find her salary for that week.

(c) Maradee’s Valentine week salary was $395.63.

How many hours of overtime did she work?