The peaking lot charges 2$ for the first hour plus 0.50 for each additional half hour or part thereof what is the total charge for parking a car in the lot from 11: 30am until 2: 15pm?

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?

Which strategy is used by public health to reduce the incidence of food poisoning?