Question

For a home with 2008 full sun hours annually and 85% system efficiency, what size array (in kW) is needed to meet 60% of their annual energy target?

A) 1.7 kW
B) 2.3 kW
C) 3.5 kW
D) 4.8 kW

Answer 1

The initial balance of the bank account is $81.

Step-by-step explanation:

The initial balance of the bank account can be found by identifying the y-intercept of the function B(x) = -9x + 81. In this case, the y-intercept is the value of the function when x = 0. So, we substitute x = 0 into the function and solve for B(0):

B(0) = -9(0) + 81 = 81

Therefore, the initial balance of the bank account is $81. So, the correct answer is b) $81.