book Maths Puzzle Numerical Ability

My son says that the answers involve parabolas, but his teacher has been absent to ask for help, and the test is tomorrow!Help! Thanks!
Given: h=-16tsquared+vt=s, a ball can be

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What would be another way to add 1+3+5+7+9+....499=to equal the sum of 62,500?
Only using odd numbers. We need another way to find the sum of all the odd numbers from 1 to 499 and equal 62,500 Given f(x) = 4x-3 and g(x) = 2x to the power of 2 - 5 find f[g(-1)] and
g[f(-1]