Afather is 3 times as old as his son. fifteen years ago, the father was 9 times as old as his son was then. find their present ages.

(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

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

15/16 as a decimal rounded to the nearest hundredth