Can anyone tell me how to do part e without calculus? Thanks!
A test is given to a large group of students. The results are given by the function f(x) = 4e^(−(x−5)^2) +3e^(−2(x−8)^2)

where x is the score in tens (e.g., x =5.6 represents 56%) and f is in hundreds of students. f has
domain 0

Question

Can anyone tell me how to do part e without calculus? Thanks!
A test is given to a large group of students. The results are given by the function f(x) = 4e^(−(x−5)^2) +3e^(−2(x−8)^2) 

where x is the score in tens (e.g., x =5.6 represents 56%) and f is in hundreds of students. f has 
domain 0 <x< 10. 
(a) How many students received a 73%? 
(b) What range of scores had more than 250 students receiving that score? 
(c) What is the most common score? 
(d) Find all local maxima and minima of this function. 
(e) How many students took this test?

joannablackwelder · Answer

@phi @IrishBoy123

ytrewqmiswi · Answer

draw graph e.e

joannablackwelder · Answer

I did that already.

ytrewqmiswi · Answer

so u want another better method

joannablackwelder · Answer

That doesn't give the the total number of students.

joannablackwelder · Answer

@nincompoop

hero · Answer

Use a TI Inspire CaIc to do it.

joannablackwelder · Answer

I don't have one. But what function do you use on it?

dumbcow · Answer

estimate using midpoint rule

use x-values of .5,1.5,2.5 ... 9.5 
sum up resulting "f" values 
this will approximate the area under the curve which represents total num of students

joannablackwelder · Answer

That's true, thanks. :-)

hero · Answer

You have to graph it first, then Use the "sum" feature under Calculus