How much heat must be added to 5.0 g of solid lead at 30.°C to convert it to liquid lead at the melting point?

With i really need the correct answer!

Jasmine is diving off a 3-meter springboard. her height in meters above the water when she is x meters horizontally from the end of the board is approximated by the equation h=-x^2+3x+3. what is the maximum height jasmine will reach on her dive?

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer