Which of the following is the inverse of y=3^x hurry a. y= 1/3^x b. y=log3x c. y=(1/3)^x d. y=log1/3x

Wesley is making patio from stones of two sizes, 5 inches wide and 10 inches wide. he wants to begin and end his pattern. with a 10-inch so there will be one more of the 10-inch stones than of the 5-inch stone. his patio will be 130 inches wide how many 10-inch stones will wesley need for one row ?