Answer: [tex]1\frac{1}{4}[/tex] hour.
Step-by-step explanation:
Given: The number of piano solos practiced by Richard = 3
Time taken by Richard to practice each piano solo=[tex]\frac{5}{12}[/tex] hour
Now, to calculate the time taken by Richard to practice all 3 piano solos, we multiply number of piano solos to the time taken to practice each piano solo, we get
The time taken by Richard to practice all 3 piano solos[tex]=3\times\frac{5}{12}=\frac{5}{4}=1\frac{1}{4}[/tex] hour.
Hence, The time taken by Richard to practice all 3 piano solos=[tex]1\frac{1}{4}[/tex] hour.