Explain how you would round the numbers 33 and 89 to estimate their sum

Ihave a 69 and an 82. the 69 is worth 40% of my grade and the 82 is worth 15%. can someone tell me my current average grade.

How can you find the mean absolute deviation (mad) for this set of data?

28 x 12 + 34 = ? it's for a test that if i fail on i will not proceed into the honor roll society i always dreamed of!me! worth 50 !