Find the difference. Express the answer in scientific notation. (8.64 times 10 Superscript 20 Baseline) minus (7.83 times 10 Superscript 20 Baseline) 8.1 times 10 Superscript 19 0.81 times 10 Superscript 20 8.1 times 10 Superscript 21 0.81 times 10 Superscript 40

step-by-step explanation:

it's is b

step-by-step explanation:

true

step-by-step explanation:

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.