ElectricPavlov

This is too many unrelated questions for ONE post..... Please post unrelated questions seperately ,,,,    

h = kl  

h = 25    l = 50

   25 = k(50)     means the proprtionality constant, k, is   1/2

so    h = 1/2 L

        h = 1/2 (10) = 5     when L = 10

Add all of these together :

    TWO triangular ends     area =  1/2 b h   =  1/2  6 x 4

     TWO rectangular sides    area   5 x 9

      ONE bottom                        area = 6 x 9           ( the bottom may or may not count as surface area in this problem......!)

Y = f(x) + 4  just shifts the graph of the function up 4 untis

        f(3)  would then be  4 + 4 = 8

https://web2.0calc.com/questions/a-few-questions-i-need-help-on#r1

Area of a triangle = 1/2 base * height

two  5 x 4 triangles      =    2   * 1/2  5 x 4

two   3 x 4.5 triangles  =    2   *  1/2  3 x 4.5

     total = 33.5  in²        Hmmmmm 

         wait a minute.....forgot the   5 x 3  bottom      total = 48.5 in²