F(t)=50001+4999e^-0.8t where F(t) is the total number of students infected after days. The college will cancel classes if 40% or more of the students are infected.
(c)After how many days will the college cancel classes?

total number of students infected after days. The college will cancel classes if 40% or more of the students are infected.

(c)After how many days will the college cancel classes?

Step-by-step explanation:

given

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.