Which graph is showing y= -(2)^×-1​

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1