Macy and Jeremy are lost at sea. Macy looks up from their sail boat at an angle of elevation of 42 degrees and sees the top of a 511 meter tall light house. What is their horizontal distance from the light house? Round to the nearest tenth of a meter. ​ ​ feet

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

y/x=18

step-by-step explanation: