Find (8.4 x 1011) (5.25 x 102)(8.0 x 103) , expressed in scientific notation.

the answer that was given before me was wrong I sware to god this is the right answer

Step-by-step explanation:2.0 x 105

1011 - 2 - 3 = 106

and  

8.4

(5.25)(8)

=  

8.4

42

= 0.2

thus,

0.2 x 106 → 2.0 x 105  so this all mean the answer is A

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.