PLZ HELP Antonia is factoring the polynomial which has four terms.
21x^3-63x^2+15x-45
3[7x^3-21x^2+5x-15]
3[7x^2(x-3)+5(x-3)]

Which is the completely factored form of her polynomial?
A. 21x^2(x-3)
B. 36x^2(x-3)
C. 3(7x^2+5)(x-3)
D. 3(12x^2+5)(x-3)​

Measures of the angle of r, 31 s (x+4) t (3x+9)

Plz a. s. a. p.the table shows the number of male and female contestants who did not win a prize. what is the probability that a randomly selected contestant won a prize, given that the contestant was female? write the probability as a percent. round to the neares tenth, if needed.

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =