It takes one student 10 hours to wash all of the cars at a school car wash. if 4 students wash all the cars, how many hours will each person spend washing cars? (assume that all students wash cars at the same rate.)

a. 40 hours
b. 5 hours
c. 0.4 hours
d. 3.5 hours

Find dy/dx using implicit differentiation ln(20+e^xy)=y

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

Suppose sat writing scores are normally distributed with a mean of 497 and a standard deviation of 109. a university plans to award scholarships to students whose scores are in the top 2%. what is the minimum score required for the scholarship? round your answer to the nearest whole number, if necessary.