What is the value of | -17 |, which is read, "the absolute value of 17"?

Which one ? is the answer and how to find this answer

Atown has a population of 17000 and grows at 2.5% every year. to the nearest year, how long will it be until the population will reach 19600?

What is 617.3 miles and each gallon of gas the car can travel 41 miles select a reasonable estimate of the number of gallons of gas karl used.