Answer :
The number of half-hour sittings needed to watch all the shows by Devon is 11
Solution:
Given, Devon records 4 hours of reality shows on her DVR
she records comedy shows for 3/8 of that amount of time.
[tex]\rightarrow \frac{3}{8} \text { of } 4 \text { hours } \rightarrow \frac{3}{8} \times 4 \rightarrow \frac{3}{2} \text { hours }[/tex]
Devon watches all the reality and comedy shows in half-hour sittings.
We have to find the number of half-hour sittings needed to watch all the shows
Now, number of half hour sittings is given as
[tex]=\frac{\text { total time of videos }}{\text { time for hlaf hour sitting }}[/tex]
[tex]\begin{array}{l}{=\frac{4 \text { hours for reality shows }+\frac{3}{2} \text { hours for comedy shows }}{\frac{1}{2} \text { hours for each sitting }}} \\\\ {=\frac{4+\frac{3}{2}}{\frac{1}{2}}=\frac{\frac{8+3}{2}}{\frac{1}{2}}=\frac{\frac{11}{2}}{\frac{1}{2}}=\frac{11}{2} \times \frac{2}{1}=11}\end{array}[/tex]
Hence Devon needs 11 sittings