Find the sum of 6 σ 2 3(0.5)^n-1. show work.

Step-by-step explanation:

Unfortunately it's not clear what you mean by 6 Σ 2 3(0.5)^n-1.  I am going to assume that you mean summing up from n = 2 to n = 6 of the expression 3(0.5)^(n-1).  Note that the "n-1" must be enclosed in parentheses.

a(2) = 3(0.5)^(2 -1) = 3(0.5) = 1.5

a(3) =  3(0.5)^(3 -1) = 3(0.5)^2 = 0.75

a(4) = 3(0.5)^(4 -1) = 3(0.5)^3 = 0.375

a(5) = 0.1875

a(6) = 0.09375

Sum these up to find the final answer.

If this is not what you expected, please start over:  fix your formatting and put this problem into a new post.

77

step-by-step explanation:

b: |12 – x| ≤ 0.25

step-by-step explanation:      

let x be the possible lengths in inches, of the ribbons jaime cut.

we have been given that jaime is cutting strips of ribbon for a project. he tries to cut each piece to be 12 inches long, but sometimes he cuts it too long or too short by as much as 0.25 inch.  

we can represent this information in an inequality as:

by the definition of absolute value function we will get,

upon combining our inequalities we will get,

therefore, the inequality   describes all the possible lengths (x), in inches, of the ribbons jaime cut.

step-by-step explanation: