45, 46, 47, 48, 49, 51, 52, 53, 54
2.40 divided by 6 is 0.40 so 0.40 times 10 is 4.00
10 time as much of something is basically just multiplication, so all you have do is multiply 60x10 which equals 600 :)
The correct answer is: [C]: " c² <span>− 16 " .
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