Which function represents exponential decay? f(x)=1/2(2)xf(x)=3/4(-1/5)xf(x)=(7/ 2)xf(x)=2(2/3)x

The answer is (D)

Step-by-step explanation:  We are to select the correct function which represents exponential decay.

We know that an exponential decay is represented by the function with base less than 1.

For example, if we consider the following exponential function:

then f(x) will show exponential growth if b > 1 and exponential decay is b < 1.

Among the given functions, represents exponential decay, because the base is 0.66, which is less than 1.

Thus, (D)   is the correct option.

The graph of this resultant function is attached, which clearly represents exponential decay.

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer