0.075, 0.75%, 3/ 4 least to greatest

Which facts are true for the graph of the function below? check all that apply. f(x) = log8 x. (30 points pls )

Is there an x intercept in the equation 60*1.15^x

3. a sum of $2700 is to be given in the form of 63 prizes. if the prize is of either $100 or $25, find the number of prizes of each type.