Which formula can be used to describe the sequence?

-3, 3/5, -3/25, 3/125, -3/625

a. f(x) = -3(1/5)^x-1
b. f(x) = -3(1/5)^x-1
c. f(x) = -1/5(3)^x-1
d. f(x) = -1/5(-3)^x-1

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6

Select the point that is a solution to the system of inequalities. y< =-x+3 y=x^(2)-3x

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236