Rebekah's baby brother weighs 7.71 pounds. How much more than 10 pounds will her baby brother weigh if he gains 1.3 pounds each week for the next 2 weeks?

0.31 pounds

Step-by-step explanation:

Rebekah's baby brother weight = 7.71 pounds

If he gains 1.3 pounds each week for the next 2 weeks

Then his new weight;

= 7.71 + (1.3 * 2)

= 7.71 + 2.6

= 10.31 pounds

Compared to 10 pounds,

= 10.31 pounds - 10 pounds

= 0.31 pounds

It means that in two weeks time if the baby gains 1.3 pounds each week, the baby will weigh 0.31 pounds more than 10 pounds.