A radioactive substance decays exponentially. A scientist begins with 170 milligrams of a radioactive substance. After 16 hours, 85 mg of the substance remains. How many milligrams will remain after 19 hours?

Step-by-step explanation:

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76%

step-by-step explanation:

24% are dogs and the remaining is 76% because 100-24=76

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.