Find the slope of a line perpendicular to each given line. y = 3/4x - 1

17 in long 1.3 ft wide and 8in high what is the volume

Hi, can anyone show me how to do this problem? 100 points for this. in advance

Amotorboat maintained a constant speed of 12 miles per hour relative to the water in going 45 miles upstream and then returning. the total time for the trip was 8.0 hours. use this information to find the speed of the current.