Question: Find the second, fourth, and eleventh terms of the sequence described by the rule
A(n)=3+(n-1)(-2)
Show your work please!

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How do i do this activity, is appreciated

Ahmed plans to add a rectangular sunroom to his house. the sunroom will have a length of 14 feet and a width of 10 feet, and the construction will cost $40 per square foot. how much more would the sunroom cost if it’s width were increased to 12 feet?