Answer:
6480
Step-by-step explanation:
18% of 1500 is 270 x 24 for each month of 2 years and you get 6480
If your ratio is 1 : 50, then for every 1 ft of the model, you have 50 feet of actual church. Thus, if the model is 3.5 ft, then
1 / 50 = 3.5 / x
where x is the actual height of the church. Cross multiply and solve for x.
1 * x = 50 * 3.5
x = 175
Thus, the actual church is 175 ft
Partial differentiation of a function with more than one variables refers to its derivative being taken with respect to one of those variables, while the rest being held as a constant.
An example is the volume of a cylinder given by:

The volume requires two variables in order to work out the volume, namely the radius and the height.
Using partial differentiation, its partial derivative can become:

This symbol is used in place of the derivative symbol, in order to distinguish total derivatives and partial derivatives.
36+x=2(11+x)
36+x=22+2x
minus x both sides
36=22+x
minus 22 both sides
14=x
answer is in 14 years
P = 1/2 x 1/2
P = 1/4 or 25%