Answer:
19 al cuadrado suma 20 al cuadrado es 761
Step-by-step explanation:
Hi there!

f(x) = 2(1/5)ˣ
Recall the form of an exponential function:
f(x) = a(b)ˣ where:
a = initial value
b = rate of decay/growth
If b > 1, the function is undergoing exponential growth. If b < 1, then the function is undergoing exponential decay.
1/5 < 1, so the function is undergoing exponential decay, not growth.
The decimal conversion to 8 39/40 is 8.975 and the decimal terminates.
You can subtract 4 from 13 then subtract 4 again