Given
$a_4 = 6$
$a_{10} = 384$
Formula
$a_n = a_m r^{n - m}$
$a_{10} = a_4 r^{10 - 4}$
$384 = 6r^6$
$r^6 = 64$
$r = 2$ → Common ratio Answer for Part 1: [ D ]
$a_4 = a_1 r^{4 - 1}$
$6 = a_1 2^3$
$a_1 = 0.75$ → First term Answer for Part 2: [ A ]
$a_7 = a_4 r^{7 – 4}$
$a_7 = 6(2^3)$
$a_7 = 48$ → Seventh term Answer for Part 3: [ C ]