An architect charges $1900 for a first draft of a medical building. If the work takes longer than 8 hours, the architect charges $105 for each additional hour. What would be the total cost for a first draft that took 13 hours to complete?

Describe all the numbers that when rounded to the nearest thousand are 645,000

Refer to interactive solution 17.45 to review a method by which this problem can be solved. the fundamental frequencies of two air columns are the same. column a is open at both ends, while column b is open at only one end. the length of column a is 0.504 m. what is the length of column b?

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.