What is the speed of a car that traveled a total of 90 km in 2 hours

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 product of the radical expression. (7-2square root) (8+2 square root)

Given: m zade = 60° and m2cdf = (3x + 15) prove: x = 15