Ahayride costs $8 per person, and there is a 25% discount for children, students, and senior citizens. if there are (p) people who do not qualify for the discount and (s) people who do qualify, which equation can be used to calculate the revenue (r)? a r = 8p - 6s b r = 8p + (0.75)(8)(s) c r = 8p + 0.75s d r = 8p + (0.25)(8)(s)

Acable company wants to provide cell phone service for residents on an island. the function for the cost of laying the cable from the island to the mainland is c(x)= 6.500 square root x2+4, where x represents the length of the cable in feet. what are the domain and range of the function? a) domain: all real numbers range: all real numbers greater than or equal to 17,000 b) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 17,000 c) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 13,000 d) domain: all real numbers greater than or equal to 13,000 range: all real numbers greater than or equal to 0

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =

Given abc find the values of x and y. in your final answer, include all of your calculations.