How many times bigger is 7,000,000,000. than 700,000,000

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.