Which explicit function defines this geometric sequence? 3, 1, 1/3, 1/9, ...

A. f(n) = 1/3 x 2^(n-1)
B. f(n) = 3 x (1/3)^(n-1)
C. f(n) = 1/3 x 3^(n-1)
D. f(n) = 2 x (1/3)^(n-1)

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

Is a positive integer raised to a negative power always positive

What statement is true? 2x^2-9x+2=-1