Help please ❤️ I don’t understand

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

(10. in the figure, a aabc is drawn tocircumscribe a circle of radius 3 cm ,such thatthe segments bd and dc are respectively oflength 6 cm and 9 cm. find the length ofsides ab and ac.