420 people. $2 for adults and $1 for children. Total receipts were $680. How many adults and how many children?

Find percent notation for 0.008 0.008=

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?

Select a graph that have an equation with a < 0