Which of the following are subspaces of r[infinity]? if not, explain why. a) all sequences such that |xj+1| ≥ |xj | for each j. b) all convergent sequences: the xj has a limit as j → [infinity]. c) all arithmetic progressions: xj+1 − xj is the same for all j. d) all geometric progressions: (x1, k x1, k2 x1, . .) allowing all k and x1

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%

question 1: step-by-step explanation:

1/4 of 84 = 84÷4= 21