18. A baby monitor picks up
siangis within a 50 meter
radius: How many square
Peters of covergue does the
heby monitor provide?

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950