The graph of y=4sin(x+3)-2 is obtained by shifting the graph of y=4sin x-2 horizontally 3 units to the left a. true
b. false

i would say true? if the unit was informational and it "refreshed your understanding", then true.

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.