A recursive rule for a geometric sequence is a1=18; an=1/5⋅(an−1). What is the iterative rule for this sequence? Question 6 options:

an=18⋅(1/5)n

an=1/5⋅18n

an=18⋅(1/5)n−1

an=1/5⋅18n−1

∠1 and ∠2 are complementary. ∠1=x°∠2=(3x+30)° select from the drop down menu to correctly answer the question. what is the value of x? . a.15 b.25 c.30 d.40 e.55

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Seattle, washington is known for being rainy. one day last month, 8 inches of rain fell in 1 1/2 hours. what us the rate of the rainfall expressed in ft per plzzz write a proportion i will give you 100 points