Vector components (-3,-9), magnitude 9.9,direction angle 251.56 what is the bearing and the map bearing

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

In the given triangle, ∠aed ∼ ∠ abc, ad = 6.9, ae = 7.2, de = 5.2, and bc = 10.2. find the measure of bd and ce. round your answer to the nearest tenth.

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?