Answer:
41.25
Step-by-step explanation:
5 miles = 8 km
= 8.25km
5 x 8.25 = 41.25 miles
41.25 miles = 66km
Step-by-step explanation:
Geometric Sequence formula for general term:
an = a1(r^n-1)
a1 = 4 × (-5)^1-1
a1 = 4
r = -5
Summation formula for geometric sequence :
Sn = a1 ( 1 - r^n / 1 - r )
...<em>take n from the top of the summation.</em>
= 4 ( 1 -(-5)^6 / 1 -(-5)
= -10416.
It costs $189-(4×$20) which is $189-$80=$109