DONT SKIP NEED HELP ASAP AND PLS HURRY WILL GIVE 30 PTS + BRAINLIEST AND PLS DONTSTEAL PTS I REALLY NEED TO GET A GOOD GRADE ON THIS AND PLS READ THE ANSWER CHOICES BEFORE YOU HELP ME I ALSO NEED ALL THREE ANSWERS IN ORDER TO PASS

What is the y intercept of f(x)=(1/2)^x?

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?