180 steel rods to be exact
Answer:
I think its the third one.
Step-by-step explanation:
Lemme know if it's right!
I hope this helps u! :D
The correct answer is
The explicit formula is of the form
,
where a₁ is the first term and r is the common ratio. Comparing this to our explicit form, we see that r = -4 and a₁ = 7.
The recursive formula is of the form
; using r=-4 gives us
Alright lets look at this problem the first step is to find out how far down she went in 4.5 minutes. so 7*4.5=31.5 ft next what you have to do is add 31.5 ft to 140 ft which is 171.5 ft next you need to subtract 112.2 ft from 171.5 ft which means that the divers current depth must be 59.3 Ft.