I need help with this first page

Leo is going to use a random number generator 4 0 0 400 times. each time he uses it, he will get a 1 , 2 , 3 , 4 , 1,2,3,4, or 5 5. what is the best prediction for the number of times that leo will get an odd number?

On a piece of paper graph f(x)=5•(0.4)^x

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =