(9√)2+5=

28−(144−−−√)2=

316−−√−5=

10−4116−−√=

√+5.4=6.76+5.4=

88.41√+1.8=

How many $20 bills do you need to have to make $280

Ineed i been stuck on this question since yesterday

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)