Acircular foundation has a radius of 9.4 feet. find it's diameter and circumference to the nearest tenth

On a piece of paper graph f(x)=5•(0.4)^x

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?

Can someone me with the property questions for 12 13 and 14 plz