1) 6
2) 48
Explanation:[tex]\text{The expression:}3\times2^t[/tex]We would replace t with the number to get the values:
When t = 1
[tex]\begin{gathered} 3\times2^t=\text{ 3}\times2^1 \\ =\text{ 3}\times2 \\ =\text{ 6} \end{gathered}[/tex]when t = 4
[tex]\begin{gathered} 3\times2^t=3\times2^4 \\ 2^4=2\times2\times2\times2\text{ = 16} \\ 3\times2^4\text{ = 3}\times16 \\ =48 \end{gathered}[/tex]