The equation 680(0.87)t=340 can be used to find the time, t, in years, it takes for 680 grams of a radioactive element to decay to 340 grams. To solve the equation 680(0.87)t=340, a student graphs the equations y=680(0.87)t and y=340.

Jack is considering a list of features and fees for current bank: jack plans on using network atms about 4 times per month. what would be jack’s total estimated annual fees for a checking account with direct paycheck deposit, one overdraft per year, and no 2nd copies of statements? a. $44 b. $104 c. $144 d. $176