Pizza dough doubles in volume every 3 minutes and reaches its maximum size in 30 minutes. how many minutes does it take for the pizza to reach half its maximum volume?
(a) 3
(b) 10
(c) 15
(d) 24
(e) 27

solution: 30/3 = 10 times.

20^10/ 2^1 = 2^9

9 x 3 = 27

why though? can someone explain the steps?

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