A fertilizer company ordered 432 tons of lime. Five truckloads of lime are delivered to the fertilizer company. If each truckload of lime weighs 84 tons, how many more tons of lime are needed to complete the order?
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Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?