Which of the following scenarios demonstrates an exponential decay

I don't know what the scenarios are but an exponential decay is when something decreases over time. On a graph its a curved line on the graph.

Ex.

If you make you answer for clear i can answer it : )

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!