The student to teacher ratio is 19: 1 at school and there is a total of 400 students and teachers. how many teachers and how many students are there?

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

The la dodgers hit the most homeruns in 2014. the number of homeruns accounted for 6% of the entire major leauge baseball homerun count. if 583 total homeruns were hit, approximately how many did the la dodgers hit

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4