Whic equation illustrates the property of multiplication?
a) (a+bi)×c=(ac+bci)
b) (a+bi)×0=0
c) (a+bi)×(c+di)=(c+di)×(a+bi)
d) (a+bi)×1=(a+bi)

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

Could someone with number 1 and 2

Which graph represents the parent function of y=(x+2)(x-2)