An animal shelter spends $1.50 per day to care for each bird and $7.50 per day to care for each cat. Matthew noticed that the shelter spent $73.50 caring for birds and cats on Wednesday. Matthew found a record showing that there were a total of 21 birds and cats on Wednesday. How many birds were at the shelter on Wednesday?

Ican interpret and represent the remainder in division calculations sensibly for the context (eg 27.4 in calculating average height in cm: $27.44 if it represents an amount of money) solve the following problems. 15) the wildlife park charges $25.50 dollars per person to enter their park if the park made $15096 dollars today, how many people entered the park? 16) ms adams plus 2,230 other keen runners ran a marathon: between them they ran 94817.5km. how many km did each competitor run?