Avani is building a rectangular play area. the length of the play area is 7.5 meters. the width of the play area is 5.3 meters. if she wants to cover the area in foam, how much foam does she need to buy?

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).