The scale of a map is 0.5 inches : 10km. Find the actual distance corresponding to the map distance of 10 inches

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Lucy and donavan measured the length of the school garden. lucys measurement is 11.3m and donavans measurement is 113 cm. could both be correct? explain

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)