Helpp me please will give brralinst

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You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?