PLEASE HELP! college algebra
posted by Anonymous .
Given the following piecewise function
f(x)= {x+1 for x < 0
{1 for 0 ≤ x ≤ 3
{2x for x > 3
a) Find the domain
b) Find the range
c) Find the intercepts
d) Is f continuous on its domain? If not, state where f is discontinuous.
e) Graph the function

the magnitude of dot and products of two vectors are 6 ander root 3 and 6 respectivly9.find the angle between the vectors.