A student named CJ wrote the vertex form equation for a quadratic function with a vertex at (2,3) and an -a -value of -1. vertex form: y=a(x+h)^2-k (h, k) = (2,3) a = -1 y= -(x+2)^2 -3. CJ was not correct on this. explain the mistakes .

A. the probability that a product is defective is 0.1. what is the probability that there will be 1 or less defective products out of the next 8 produced products b.the expected number of imperfections in the coating nylon for parachutes is 6 per 100 yards. what is the probability of finding 12 or fewer imperfections in 260 yards c.in a lot of 54 products there are 9 defective products. calculate the probability that not more than 1 is defective from a random sample of 17 products.