11. In item number 9, how many phones should he sell in a month to make an income of P79,500?
a. 45
b. 58
d. 67
12. Ka Ai spent P1,200 on mask because of pandemic. Each mask costs P100. How many masks did he buy?
a. 10
b. 12
d. 95
13. Mark used 15 m of copper wire which weighs 1 kg. If a copper wire weighs 3.5 kg, how many meters is it?
a. 50m
b. 52.5m
c. 53.5m
d. 54m
14. Jun worked in the store for 5 hours. He earned a total of P1,500. How much does he earn each hour?
a. P300
b. P400
c. P500
d. P600
15. Marvin is selling a puto in the function of f(x) = 10x, how much is Marvin's income if a customer wants to
buy a total of 50 pieces?
a. P450
b. P500
C. P550
d. P600​