Question

Sheryl's salary is $1200 per month plus a 10% commission on her sales. What amount of sales would she need to earn at least $2000 per month?

a. Her sales must be over $8000.
b. Her sales must be $8000.
c Her sales must be at least $8000.
d. her sales must be less than $8000.

Answer 1

B...She must sell $8000 ;)

Answer 2

let her sale x
\[1200+0.1x \ge 2000\]
so 0.1x\[0.1x \ge 800, x \ge 8000\]