Could someone help me with this, I have a few minds left. thanks!! Also marking as brainiest.

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

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?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.