Use synthetic division to determine if the given value for k is a zero of this polynomial. If not, determine p(k). p(x)=4x^2−(5−6i)x+(18−15i);k=−3i

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?