Most scientific calculators have keys for log₁₀ x and ln x. To find logarithms to other bases, we use the equation log_a x = (ln x)/(ln a). Find the following logarithms to five decimal places.

a. log₃ 8

b. log₇ 0.5

c. log₂₀ 17

d. log_0.5 7

e. ln x, given that log₁₀ x = 2.3

f. ln x, given that log₂ x = 1.4

g. ln x, given that log₂ x = -1.5

h. ln x, given that log₁₀ x = -0.7