A 15 tip is left on a $68.75 dinner bill. How much is the tip?

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?

What is the y intercept of f(x)=(1/2)^x?

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.