Which expression represents the product of an unknown number and 19?
a.
19 ÷ n
b.
n + 19
c.
n – 19
d.
19 • n

What is the prime factorization of 195

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

How many four digit even numbers can be formed from digits 1,2,3,4,5 if repetition is allowed. how can solve this using permutation formula