x = 81^(1/4) = 3.

log10(0.01) = log10(10^-2) = -2.

log10(1) = 0 because 10^0 = 1.

log10(100) = 2 because 10^2 = 100.

log10(1000) = log10(10^3) = 3.

log10(50) is approximately 1.7.

1/8 = 2^-3, so log2(1/8) = -3.

log2(16) = 4, since 2^4 = 16.

log2(32) = log2(2^5) = 5.

log2(8) = 3 and log2(4) = 2, so 3 + 2 = 5.

log3(81) = log3(3^4) = 4.

log4(16) = log4(4^2) = 2.

log5(25) = log5(5^2) = 2.

log7(49) = log7(7^2) = 2.