Find the cosine of ∠R. Simplify your answer and write it as a proper fraction, improper fraction, or whole number.
cos (R) =

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons

The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1387 grams and standard deviation 161 grams. what is the probability that a randomly selected broiler weighs more than 1,425 grams?