Let's get the data out of the problem:
Nv = 18
Ov = 12
Now, we can apply in this equation that relates the new and the old values:
i = Nv / Ov
i = 18 / 12
i = 1.5
Now, we just consider what has passed from 1, and this is 0.5, converting to percentage it is:
p = 0.5 . 100
p = 50%
The increase was 50%.
Hope it helps.
SOLUTION
Given the question in the image, the following are the solution steps to answer the question.
STEP 1: Write the given function

STEP 2: Plot the given function
STEP 3: choose the correct graph
It can be seen from the plotted graph in step 2 that:

Hence, comparing the x-intercepts, the correct graph is seen in:
444.3 = (4 x 100) + (4 x 10) + (4 x 1) + (3 x 1 /10 )
Answer
A. (4 x 100) + (4 x 10) + (4 x 1) + (3 x 1 /10 )
Answer:
eqn : 9 x 9 x h = 1620
h = 1620 / 81 = 20
Step-by-step explanation: