By switching service providers , a family's telephone bill decreased from about $ 50 a month to about 44 . What was the percent decrease ?

Me because some of question i don’t understand

Abouncy ball is released from a certain height. on the first bounce, it travels 32cm. with each subsequent bounce, it travels 9/10 the distance of the previous bounce. what is the total distance that the ball has traveled when it completes its 25th bounce?

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