Ted's Bikes rents bikes for $15 plus $3 per hour. Carlos paid $30 to rent a bike. For
how many hours did he rent the bike?

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter?

Similarly fie each expression 18,19,20