Rock can read 10 books in 30 minutes. how long does it take rock to read 15 books, if the speed is consistant.

Super ultra mega important if you can answer this correctly i will give you 100 points but if you don't answer it correctly you'll get a big report. so stay aware and have a nice day!

From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?