Answer:
y = 64(0.5)ˣ
Step-by-step explanation:
We can write this as an exponential decay function. The formula for that is y = a(1 - b)ˣ where a is the initial value and b is the decay factor. In this case, a = 64 and b = 1/2 or 0.5 so the final answer is y = 64(0.5)ˣ.
Pretty sure no one is gonna do this because it’s so long (no offense)
Isolate the variable by dividing each side by factors that don't contain the variable.
x = -20
Hope this helps!
Have a great day!