His baby brother sleeps 21 hours.
There's a total of 24 hours in a day so you can divide by 8. That means 1/8 of the day is equal to 3 hours, so 7 times 3 hours equals 21 hours
The answers are:
Thea reads 180 words per minute...
Eleanor reads 450 words every 2 minutes...
After 1 hour of reading, Elanor reads more words than Thea
Use the trigonometry triangles SOH CAH TOA
Sin= opposite/hypotenuse
Opposite= opposite the angle
Hypotenuse is the longest side