Let * be the binary operation z (set of integers) defined by a*b=2ab+5 . 1. Show that * is commutative. Hint: Show that a*b=b*a.

2. Show that * is Associative. Hint: Show that (a*b)*c=a*(b*c).​

Sara needs to take a taxi to get to the movies the taxi charges $4.00 for the first mile and then $2.75 for each mile after that if the total charge is $20.50 then how far was sara’s taxi ride to the movie

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

Write the equation in logarithmic form e^x=403.429