Answer:
30.5 hours
Step-by-step explanation:
If he were to average 8 hours PER week for 4 weeks, his total sum would have been:
8 * 4 = 32 hours
But he fell short of it. By how much?
By 
hours!
So, he practiced 1 1/2 hours LESS THAN 32 hours, so his practice time is:
So, <u>he practiced 30.5 hours in the 4 weeks</u>
Answer:
-0.89, 4/10, 1/2, 9/8, 2
Step-by-step explanation:
To do this you want to first multiply 28 by 0.15. This will give you $4.20. You have to give a $4.20 tip. The total cost would be the lunch and the tip added together. It would give you a final total of $32.20.
By the Pythagorean theorem
.. 15^2 = 10^2 +a^2
.. 225 = 100 +a^2
.. 125 = a^2
.. √125 = a
.. 5√5 = a ≈ 11.18
The missing side length is 5√5 cm.
