Which of these exponential functions illustrate an exponential decay? *
a. y =(1/2)^x
b. y = 2^x
c. y = (1/2)^(-x)
d. y = -2^x

Which of the following is equivalent to 10^(x-5)> 100^(x-10) ? *
a. 10(10)^{x-5} > 100*(x-10)
b. 10^(x-5) > 10^(2x-20)
c. 10^ (x-50) > 1^ (10(x-10))
d. 14(X-5) > 10^(2x-20)​