Hailey works as a lifeguard at a local water-slide park. when she works past 7 p.m., she receives overtime pay of 1.5 times the normal rate. last week hailey worked 15 hours at the normal rate and 10 hours of overtime. if hailey earned $375 last week, what is her normal rate of pay?
a.$12.50
b.$13.50
c.$15.00
d.$9.00