Suppose c and d vary
inversely, and d = 2 when c =17.
a. Write an equation that models the variation.
b. Find d when c = 68.
a. The equation that models the variation is:
c * d = k, where k is a constant.
b. Given that d = 2 when c = 17, we can find the constant k:
17 * 2 = k
34 = k
Now we can find d when c = 68 using the equation:
c * d = 34
68 * d = 34
d = 34/68
d = 0.5
Therefore, when c = 68, d = 0.5.