Casey can install a fountain in a school garden in 20 hours. samuel can install a similar fountain in the same school garden in 30 hours. if they work together, they would take a total of t hours to install the fountain. write an algebraic expression in terms of t for the fraction of the fountain they can install together in one hour. write an equation for t. solve for t to find the total number of hours they would take to install the fountain if they work together.

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes

Which of the following shows the graph of y=2e^x?