Answer
EC=2.8
Work Step by Step
$\frac{EC}{7}$=$\frac{4}{10}$
5EC=14
EC=2.8
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.