Make a ratio, then cross multiply.
4/30=x/48
30x=4x48
30x=192
x=6.4
B
70^2 -30^2=5184
square root answer to get 72
Answer
Option (A) is correct .
Reason
The formula for the slope.

As given
Line AB contains (0, 4) and (1, 6) .
put in the slope formula


Slope of the AB is 2.
As given
Line CD contains points (2, 10) and (−1, 4).
put in the slope formula


Slope = 2
Slope of the CD is 2.
As the slope of the AB contains (0, 4) and (1, 6) Line CD contains points (2, 10) and (−1, 4) is 2 .
Therefore the option (A) is correct i.e the lines are parallel because the slopes are the same.
The question ask to find and choose among the following choices the best function that is correct for Jan's purpose and the new growth rate and the best function would be letter f(x)=4(1.15)5x, growth rate is 15%. I hope you are satisfied with my answer and feel free to ask for more