exam Maths Puzzle Numerical Ability

Please help me solve this problem..... i cant find anyone that knows how to do this: the direction are graph and find the domain and range to each function.

y=sqrt x+1 not in sqrt -3
if anyone could help i would appreciate it!!

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exam Other Question

Solve for n

400*(1.2^n)-680*(.85^n)=0 "^n =raised to power of n"

I used excel solver and found that n=1.54 but how do you do it and show the work?


Thanks
5. solve this oblique triangle. a=96 in., b=58in., B=30degrees.