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Math·Advanced Math·Nonlinear functions

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$x$	$y$
1	10
2	16
3	$a$

The table shows three values of $x$ and their corresponding values of $y$ for the equation $y=3(2{)}^x+4$. In the table, $a$ is a constant. What is the value of $a$?

A

22

B

24

C

28

D

52