Evaluate the following expression using the values given:
find −a2 − 3b3 + c2 + 2b3 − c2 if a = 3, b = 2, and c = −3.

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

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

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.