General Mathematics. rational function.

ACTIVITY 4 PROBLEM A PROBLEM B Hello! Paint my Wall A certain cellphone company offers a plan that costs P1,200.90 per month. The plan includes 180 free minutes of call and charges P7.00 Analiza can paint a room in 3 hours. Leoben can do it in 2 hours. Walter for each additional minute of usage. can do the painting job in 5 hours. If all of them worked together, how long will it take them to paint the room? a. Find the monthly cost function Cfx/ where x represents the number of minutes used. Hint: Monthly Cost = Plan Cost + Additional Charge per Minute PROBLEM C b. How much is the monthly cost incurred if the owner used 180 minutes of call? I am thinking of a number, the sum of twice a number and 8 divided by 12 is greater than or equal to 4. Find the number/ numbers. c. How much is the monthly cost of the plan if the owner used 300 minutes of call