Which is an exponential decay function? f(x) = 3/4(7/4)^x
f(x)=2/3(4/5)^-x
f(x) = 3/2(8/7)^-x
f(x) =1/3(-9/2)^x

Ineed if you could explain and give me the answer you! this needs done

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?

Agroup of randomly selected members of the foodies food club were asked to pick their favorite type of food. the bar graph below shows the results of the survey. there are 244 members in the foodies.