Here is a key that showed up online
Find the unit rate:
That would be 24.8 cm
------------ = 0.14 cm/yr average
175 yr
Answer:
1 : 45
Step-by-step explanation:
Given
Rs 20 and 900 ( divide both by 20 )
= 1 : 45
B.
You can get this by using the quadratic equation, which I listed below.

With a = 2, b = 1, c = -45