EA2 Currency conversion 10-14 and 10-17

Page 47; items 1, 2, 3, 4

1. For E(D) = 0.64D - 5, the domain units are dollars and the range units are euros
1. For R(E) = 12.1E - 10, the domain units are euros and the range units are rand.

2. When D = 450, E(D) = 0.64(450 dollars) - 5 = 283 euros
    When E = 283, R(E) = 12.1(283 euros) - 10 = 3414.30 rand

Compose the functions by putting one function inside the other.

3. R(E(D)) = R an outer function operating on E and inner function operating on D a variable.
    R(E(D)) = 12.1(0.64D - 5) - 10
    R(E(D)) = 7.744D - 70.5
    When D = 450, R(E(450) = 7.744(450) - 70.5 = 3414.30 rand