Aditi is participating in a walkathon fundraiser. Two anonymous donors agree to donate money according to the distance she walks. The money, A, in dollars, that she receives from the first donor for walking d kilometers is given by the formula A(d)=12d. The total money, T, in dollars, that she receives from both donors for walking d kilometers is given by the formula T(d)=d^2+20d

A(d) + B(d)

12d+d^2

Step-by-step explanation:

it wants the total money so you add 10d and 2d but you can't add d^2 because it has an exponent and its the only one that has one

Step-by-step explanation:

B(d)=T(d)-A(d)

D^2+8d

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.