Exponential Functions

[Tom4]

The number of words per minute that an average typist can type is given by

W(t)= 60-30e ^-.5t

where t is time in months after the beginning of a typing class. Find each of the following

(a) W (0) (b) W (1) (c) W(4) (d) W(6)

 

[mmm4444bot]

My hope for you is that you posted your exercise on the wrong board.

W(0) is function notation for the value of W when t = 0.

We calculate this value by substituting the number 0 for the symbol t in the algebraic definition for W, and doing the arithmetic.

W(0) = 60 - 30 * e^(-0.5*0)

That's 30.

We calculate the values of W(1), W(4), and W(6) the same way. Evaluate W for t = 1, 4, and 6, respectively.

I welcome specific questions about this.

Cheers ~ Mark