Decreasing Value of the Dollar.In 2005, it took $19.37 to equal the value of $1 in 1913. I...

Decreasing Value of the Dollar.In 2005, it took $19.37 to equal the value of $1 in 1913. In 1990, it took only $13.20 to equal the value of $1 in 1913. The amount it takes to equal the value of $1 in 1913 can be estimated by the linear function V given by

V(x) = 0.4123x + 13.2617,

where x is the number of years since 1990. Thus, V(1) gives the amount it took in 2001 to equal the value of $1 in 1913.

a) Use this function to predict the amount it will take in 2015 and in 2020 to equal the value of $1 in 1913.

b) When will it take approximately $30 to equal the value of $1 in 1913?