Notice that if you go forward, the common ratio is 5. Each new term is found by mult. the previous term by 5.
If, on the other hand, you go backwards (terms decreasing), then you divide a term to find what the previous term was.
Here, divide 1 by 5 to find the first term. It's 1/5.
20/4 = 5
$5 is the cost of 1 shirt.
Instead "tan x°" in your question must be:"...what is the value of sin x° ?"
In that case: sin x° = tan x° · cos x° = 3 / y · y / z = 3 / z
Answer: A ) sin x° = 3 / z
