if c = 4, then 200 − 10(4) = 200 - 40 = 160 < 150 (FALSE)
if c = 6, then 200 − 10(6) = 200 - 60 = 140 < 150 (TRUE)
if c = 10, then 200 − 10(10) = 200 - 100 = 100 < 150 (TRUE)
if c = 12, then 200 − 10(12) = 200 - 120 = 80 < 150 (TRUE)
answer
4 does not satisfy the inequality 200 − 10c < 150
