There are 18 pieces of chalk. the ratio of chalk that is yellow to chalk that is not yellow is 1 to 2. how many pieces of chalk are yellow?

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.