At the amusement park, laura paid $6.00 for a small cotton candy. her older brother works at the park, and he told her they mark up the cotton candy by 300%. laura does not think that is mathematically possible. is it possible, and if so, what is the price of the cotton candy before the markup?

High schoolmathematics 5 points keith is the leading goal scorer for a team in an ice hockey league. last season, he scored 42 goals in 82 games. assuming he scores goals at a constant rate, what is the slope of the line that represents this relationship if the number of games is along the x-axis and the number of goals is along the y-axis?

Kevin's bank offered him a 4.5% interest rate for his mortgage. if he purchases 3 points, what will be his new rate?

Prove that 16^4-2^13-4^5 is divisible by 11.