How can you use the double number line diagram to find what percent 240 is of 300​?

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Ineed to know the answer to this algebra question.

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?