An element with a mass of 540 grams decays by 17.9% per minute. To the nearest minute, how long will it be until there are 90 grams of the element remaining?

Afudge recipe calls for 1/2 cup of cocoa if only 1/2 of the recipe is made to how much cocoa should you use

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?