HELP ME PLEASE WHOEVER GETS IT RIGHT FIRST WILL BE MARKED AS BRAINLIEST!!

I believe it's D. 3

Step-by-step explanation:

1  in ^3

Step-by-step explanation:

The volume or a rectangular prism is

V = l*w*h

  = 1/2 * 2 *1

  = 1  in ^3

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.