Answer :
Take into account the following formula for an arithmetiv sequence:
[tex]a_n=a_1+(n-1)d[/tex]where:
a1: first term = 49
n: number of the term = 28
d: difference = 6
replace the previous values of the parameters into the formula for an:
[tex]a_{48}=49+(28-1)\cdot6=49+162=211[/tex]Hence, the 28th term of the sequence is 211