Answer:
4
Step-by-step explanation:
-20+15+30+-45=-20
-20/4=-5
The average is -5
Answer: 10h + 15 = 50
Step-by-step explanation:
Since h is per hour, and it costs $10 per hour, the cost per hour would be 10h, plus the one-time 15 dollar fee.
To find how many hours you can participate, you plug in 50 into the equation and solve it. h = 3.5, meaning you can participate for 3 hours.
density= mass/volume
mass= densiy x volume
mass= 6.3 g/mm^3 x 30mm^3= 189 g