Select all that represent a proportional relationship. 6
х
5
y
3
4+
2
A.
3
B.
4.
2+
1+
6
0
1 2 3
4 5 6 7 8 9
8
6
6-
y
5
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4
1
c.
3+
D.
6
N
2+
9
1
3
0
X
1 2 3 4 5 6 7 8 9
12
4

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

John checked his watch and said that it is thursday, 7 am. what will the day and time be 2006 hours plzzz i will give you 100 points

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .