Solve.
31. aristotle was born in 384 bc. ron howard was born in 1952 ad.
how many years apart were they born?

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

What is the measure of sty in oo below? 130 310 230 50

Arace is 10 kilometers long.markers will be placed at the beginning and end of the race course and at each 500 meter mark.how many markers are needed to mark the course for the race?