There are two students Mark and John. If John scored 1050 in his test and received 70% and Mark received twice as less as John, then what is?
a) The total marks
b) the marks obtained by John and Mark.

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

What is the ordered pair of m’ after point m (5, 6) is rotated 90° counterclockwise?

Acontainer full of water weighs 15.5 lbs. when ¼ of the water is poured out, the container now weighs 12 ½ lbs. how much does the container weigh when empty?