When a digital clock reads 3: 47 the sum of the digits is 14. how many minutes after 3: 47 will the sum of the digits be 20 for the first time

Pls! does anybody know a shortcut for answering these types of questions in the future?

One month, a music site observed that 60% of the people who downloaded songs from its site downloaded q sam's latest single. the equation below represents this information, where x represents the total number of people who ddownloaded songs from the site that month: x = 0.6x + 384 how many people who downloaded songs from the site that month downloaded q sam's latest single?

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?