A baby-sitter charges $3.00 for the first hour and $1.25 for each additional hour or part of an hour. How much will she receive for 4 1/2 hours of baby-sitting?

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Shryia read a 481 -page-long book cover to cover in a single session, at a constant rate. after reading for 1.5 hours, she had 403 pages left to read. how fast was shryia reading? pages per hour how long did it take her to read the entire book? hours plz i realy need this

Can (2,3 and square root 10) be sides ona right triangle?