Convert the exponential equations to the logarithmic form. yt-9 = r+15

a) log y (r+15) = t-9

b) log y (t-9) = r+15

c) log r+15 (t-9) = y

d) log t-9 (r+15) = y

e) log r+15 y = t-9

f) log t-9 y = r+15