Sam and Tyrone each build model cars. Altogether, Sam and Tyrone have built 42 model cars. The ratio of cars Sam has built to cars Tyrone has built is represented by the tape
diagram shown below. What is the number of cars represented by each square?
Sam
Tyrone
Plz I need help fast

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?

Which angle of rotation is an angle of rotational symmetry for all figures?

Which angle is the smallest? also give me an explanation so i can complete it to other questions as well, : )