THe problem is basically telling us: 
where P is the power disappated and V^2 is our voltage squared.

So, for the second example to find the power we simply have to plug k and our voltage back in, so:
Answer:
60
Step-by-step explanation:
let's say the angle is x
tan x=2√21/2√7=1.73205...
tan inverse of it = 60
Answer:
48 inches
Step-by-step explanation:
64 - 16 = 48 inches
I do gymnastics :) I have been doing since I was 3
Answer: 4X2=8 and 8X1=8
Step-by-step explanation: <u><em>brainly pls</em></u>