Please help me only answer if your 100 percent sure and/or if you took the benchmark

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

(a. s."similarity in right triangles"solve for xa.) 10b.) 20c.) 14.5d.) [tex] 6\sqrt{3} [/tex]