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The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

Write the equation in logarithmic form e^x=403.429