A boat travelled against the current between two harbors in 40 minutes and returned with that current in 6 minutes less than it would take in still water. Find the greatest number of minutes for the return trip. A,18 B,5 C,24 D,10 E,25
Thanks in advance.

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

Ms. ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms. ortiz charge per kilogram of tomatoes to make on a load of tomatoes?

What does independent variable and dependent variable mean in math?