PassageLet XX be a continuous random variable with PDF fX(x)=k(x2+x)f_X(x)=k(x^2+x), 0≤x≤10\le x\le1, and 00 otherwise. Based on the above data, answer the subquestions.
QuestionIf E[X]=0.7E[X]=0.7, find Var(X)\operatorname{Var}(X). Enter the answer correct to two decimal places.