Answer:
The length of rectangle is 6 units and the width is 1.5 units
Step-by-step explanation:
Let
L -----> the length of rectangle
W ----> the width of rectangle
we know that
The area of rectangle is equal to

we have

so
-----> equation A
A rectangle width is one fourth it’s length
so
----> equation B
substitute equation B in equation A and solve for L


take square root both sides

Find the value of W


Answer:
$17.28
Step-by-step explanation:
20% of $86.40
=
× $86.40
= 0.2 × $86.40
= $17.28 ← commission