Final answer:
The given expressions are incorrect because they are missing the exponential component and use incorrect constants for the formula. To correct them, include the exponential component and use the correct constant (b).
Step-by-step explanation:
The given expressions are: A. f(12)=39.9(1.09) B. f(35)=39.59(1.09) C. f(12)=39.9(2.81), D. f(35)=39.59(20.41)
To find the mistakes, we need to compare the expressions to the correct formula for calculating f(x). The correct formula is f(x) = a * (b^x), where a and b are constants. Let's analyze each expression:
A. f(12)=39.9(1.09) - This expression is incorrect because it is missing the exponential component (b^x).
B. f(35)=39.59(1.09) - This expression is incorrect because it is missing the exponential component (b^x).
C. f(12)=39.9(2.81) - This expression is incorrect because it uses the wrong constant (2.81 instead of b).
D. f(35)=39.59(20.41) - This expression is incorrect because it uses the wrong constant (20.41 instead of b).
To correct the expressions, we need to include the exponential component (b^x) and use the correct constant (b) instead of the incorrect ones.