Kaylee wrote in her dinosaur report that the Jurassic period was 1.75 x 108 years ago. According to Kaylee’s report, how many years ago was the Jurassic period?

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?