Jackson receives 40% discount on a concert that costs $75. if jackson pays $4.20 in sales tax on the discounted ticket, what is the sales tax rate? (round to the nearest tenth of a percent)

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like:

7 is the median   7.875 is the mean

step-by-step explanation:

3,4,5,6,8,11,13,13