Brittany babysat for 21 hours and earned $3. Pia was paid $20 for babysitting for 75 hours. On average, how many dollars per hour was Brittany paid to babysit? On average, how may dollars per hour was Pia paid to babysit? Use unit rates to determine who earns a higher hourly rate. ​

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?

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Can you me find the missing length. i attached an image.