True or false? the domain of the function in the box is the set of all positive real numbers f(x)=(3/4)^x

Chip worked at the animal shelter for 6 hours each week for several weeks. he worked for a total of 42 hours. which of the following can be used to find the number of weeks chip worked at the animal shelter?

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

Which number completes the inequality? 2/3 < _ < 7/9