we have

we know that

and

substitute in the expression



therefore
<u>the answer is</u>

Answer:
C. f(x)=3(1/2)^x
Step-by-step explanation:
standard form of a function is f(x)=ab^x
a should be 3, or the y value where the x value is 0
the b value is 1/2 because that's the rate of change
The difference will be

.
Remember that parentheses are needed for the second polynomial because the negative is distributed to all of its terms.
Since this is a scalene triangle, two sides will equal the same, meaning two angles will equal the same. So 70 has an equal on the other side, meaning 70+70=140, and x will equal the remainder, meaning x=40.
Hope that helps.
0.32 is the answer you are looking for.