The height of a 12-year-old boy increased by 17% last year and by 12% this year. what is the total increase in percent terms?

Total increase in height is 31.04 %

Step-by-step explanation:Let  initial height be x.

                                           Height increased  last year= 17% of x = 0.17x

                                           so last year height = x +0.17x = 1.17x

                    Height increased this year = 12%

                       so increase in this year height = 12% of 1.17x = (0.12)(1.17x)

                                                                               = 0.1404x

                                Height of this year = 0.1404x +1.17x = 1.3104x

                          total increase = 1.3104x - x = 0.3104x

                          % increase =      

                                              =    

                                              = 31.04              

i'm assuming it's looking for the missing length, which should be 4cm

hope this !

a

b

d

step-by-step explanation: