Answer:
D. 9%
Step-by-step explanation:
1.04 / 2 = 0.52
2.52 / 4 = 0.63 best 1
4.32 / 8 = 0.54
9.12 / 16 = 0.57 best 2
if base on the best deal 1 - 0.63
(0.63 - 0.57) / 0.63 = 0.0952 (≈ 0.09 i.e 9%)
Answer:

Step-by-step explanation:
We can write the equation of a line in 3 different forms including slope intercept, point-slope, and standard depending on the information we have. We have a point (8,1) and a slope from the equation y=-23x+5. We will chose point-slope since we have a point and slope.
Point slope:
in our new equation because it us perpendicular to it. This means we will need to change it into its negative reciprocal which is
.
We will substitute
and
.
.
This is the equation of the line perpendicular to y=-23x+5 that crosses through (8,1).
Use ratio and proportion
$23/$x=63%/100%
cross multiply
63x= 2300
divide
x= $ 37.50 selling price
hope this helps