# Model with function combination

### Problem

Onur is participating in a walkathon fundraiser. Two donors promised to donate money based on the total distance he walks. The money, A, in dollars, that he receives from the first donor given that he walks d kilometers is given by the formula A, left parenthesis, d, right parenthesis, equals, 10, d. The money, B, in dollars, that he receives from the second donor given that he walks d kilometers is given by the formula B, left parenthesis, d, right parenthesis, equals, 2, d, plus, d, start superscript, 2, end superscript.
Let T be the total money that Onur raises from those donors by walking d kilometers in the walkathon.
Write a formula for T, left parenthesis, d, right parenthesis in terms of A, left parenthesis, d, right parenthesis and B, left parenthesis, d, right parenthesis.
space, T, left parenthesis, d, right parenthesis, equals
Write a formula for T, left parenthesis, d, right parenthesis in terms of d.
space, T, left parenthesis, d, right parenthesis, equals
Do 4 problems