If i could type only 20 words per minute, then after 2 weeks of practicing, i started typing 35 words per minute, what would be my percent of increase

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?

Is the power produced directly proportional to the wind speed, give reasons for your answer?