Answer:
r=11x
Step-by-step explanation:
Answer:
Yes
Step-by-step explanation:

If we say u = √n, then:

This is a geometric series. Since |1/e| < 1, the series converges.
Answer:
30N
Step-by-step explanation:
Normal reaction
Answer:
65
Step-by-step explanation:
Since 39 is equal to 60%, and 60% is also equal to 60/100, then 39/x (x is the total we are solving for) is equal to 60/100.
Cross multiply so 39/x = 60/100
39*100 = 60x
3900 = 60x (divide both sides by 60)
65 = x
If each face has an area of 4 than the side lengths are 2, because area is b•h and 2•2 is 4. Now, volume is length•width•height. All of these will be two because sides are the same in a cube. 2•2•2 is 8, which is your answer