20. Last week, Tanya babysat for a total of \( 11 \frac { 1 } { 12 } \) hours. This week, she babysat for \( 6 \frac { 1 } { 4 } \) hours. She wants to find the total time, in hours, that she babysat for the \( 2 \) weeks. Which fractions show the total time in hours? Select all possible answers.
A. \( 17 \frac { 3 } { 6 } \)
B. \( 17 \frac { 4 } { 12 } \)
C. \( 17 \frac { 1 } { 6 } \)
D. \( 17 \frac { 1 } { 3 } \)
E. \( 17 \frac { 2 } { 16 }\)
B D
Find the inverse for each of the following functions.
\(f ( x ) = 3 x + 1\)
\(g ( x ) = 1 x ^ { 3 } - 5\)
\(h ( x ) = \frac { 3 } { x + 5 }\)
\(j ( x ) = \sqrt[ 3 ] { x + 1 }\)
The total revenue from the sale of a popular book is approximated by the rational function \( R ( x ) = \frac { 1700 x ^ { 2 } } { x ^ { 2 } + 4 } \) , where \( x \) is the number of years since publication and \( R ( x ) \)
is the total revenue in millions of dollars.
(a) Find the total revenue at the end of the first year.
(b) Find the total revenue at the end of the second year.
