Someone pls help me with this. ​

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Find the measure of angle b in the following triangle

This trip the family will spend $117.96. the next trip they will spend $119.27. this is an increaseof $117.96 - $119.27| or an increase of $1.31.what is the percent of increase? round your answer to the nearest whole percent. type your answer into the space.the percent of increase is: resetsubmit