During his vacation, Dalyn rents a small boat from a rental service that charges a flat fee of $50 plus $20 per hour (including taxes). The total charge comes to $150, which equation can be used to calculate the number of hours, X, that Dalyn rents the boat?
A 20x + 50 = 150:5 hours
B20(x + 50) = 150.5 hours
C 50x + 20 = 150:4 hours
D 30(X + 10) = 90.4 hours

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 language majors, anna and megan, took exams in two languages. anna scored 85 on both exams. megan scored 74 on the first exam and 85 on the second exam. overall, student scores on the first exam had a mean of 82 and a standard deviation of 4, and the second exam scores had a mean of 71 and a standard deviation of 13. a) to qualify for language honors, a major must maintain at least an 85 average across all language courses taken. so far, which of anna and megan qualify? b) which student's overall performance was better?

Acolony contains 1500 bacteria. the population increases at a rate of 115% each hour. if x represents the number of hours elapsed, which function represents the scenario? f(x) = 1500(1.15)" f(x) = 1500(115) f(x) = 1500(2.15) f(x) = 1500(215)