Janelle has 29 coins in her collection. Her goal is to have at least 45 coins by the end of the year. Write and solve an inequal

I believe this is correct

Rounding 17.2 to one significant figure gives you 17. This is because when the digit after the decimal point is below 5, you simply keep the number as is, but if it's 5 or above, you round up.

They must sell 250 cameras 
and 50 more cameras would be a $400 profit