So, from the problem we can deduct that Peter earns $4.50(3 hours/day) = $13.50 per day. And Cindy earns $4.50(2 hours/day) = $9.00 per day. Therefore, Peter daily earning are higher than Cindy's, this can be expressed with the following inequality:
Peter's daily earnings > Cindy's daily earnings
$13.50 > $9.00
On the other hand, if Cindy earns at least $14 per day, that means she earns $14/2 hours per day = $7 per hour, because she only works 2 hours each day. But, the problem says "at least", so the correct expression would be
Explanation: Area of a triangle= 1/2base x height Plug in information 30=1/2 x 4 x h Solve 1/2 x 4 = 2 30= 2 x h Divide both side by two 30/2=2 x h/2 Solve: 15= h