What type of reactive intermediate is formed in the reaction of an alkene with HI to give an lodoalkane? Carbocation Radical Cyclic bromonium ion Carbanion

2. В параллелограмме \( A B C D \) на стороне \( A B \) отмечена точка \( K \) так, что \( A K: K B=2: 1, O \) - точка пересечения диагоналей. Выразите векторы \( \overline{O C} \) и \( \overline{C K} \) через векторы \( \vec{a}=\overline{A B} ; \vec{b}=\overline{A D} \).

Current Attempt in Progress With \( t \) in years since 2016, the height of a sand dune (in centimeters) is \( f(t)=550-2 t^{2} \). Find \( f(5) \) and \( f^{\prime}(5) \). Using units, explain what each means in terms of the sand dune. \( f(5)= \) \( f^{\prime}(5)= \) In the year i eTextbook and Media

If \( f(t)=t^{4}-2 t^{2}+3 t \), find \( f^{\prime}(t) \) and \( f^{\prime \prime}(t) \) \( f^{\prime}(t)=\square \) \( f^{\prime \prime}(t)=\square \)

A ball is thrown straight upward. The function \( f(t)=-16 t^{2}+64 t \) describes the ball's height above the ground, \( f(t) \), in feet, \( t \) seconds after it is thrown. Complete parts a through \( c \). \( I(4)=0 \) Interpret \( f(4) \). The ball is 0 feet above the ground after 4 seconds. c. Factor the polynomial \( -16 t^{2}+64 t \) and write the function in factored form. \( f(t)=\square \) example Get more help \( ~ \)

Question \( 10,5.3 .79 \) A ball is thrown straight upward. The function \( f(t)=-16 t^{2}+64 t \) describes the ball's height above the ground, \( f(t) \), in feet, \( t \) seconds after it is thrown. \( 90 \%, 9 \) of 10 points Complete parts a through \( c \). a. Find \( f(1) \). \( f(1)=\square \)