Answer:

Step-by-step explanation:
For perpendicular lines, we use the same y-intercept. Though, to find the slope of perpendicular lines, we use opposite reciprocals. The opposite reciprocal of
is
.
The square root of 144=12
169=13
the difference is 13-12=1
Answer:

Step-by-step explanation:
Given
--- initial
-- rate
Value after a year = $20.70
Required
Expression to calculate its value after y years
This is calculated using:

Where

Substitute
in 



Substitute
and
in 

Answer:
13620000
Step-by-step explanation:
Answer:
28
Step-by-step explanation:
Area (trapezoid) = 1/2 x (6 + 8) x 4
= 2 x 14
= 28