-A flagpole is supported by three wires BA, BC and BD, as shown in this diagram.
a Calculate ADB.
b Find the area of triangle ABD.
c Find the angle of elevation of the top of the tower from point C.
d Show that triangle ABC is not right angled

Can someone me with my hwplz(only the circled ones)

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms