There are 4 blocks in the top of first tier of a pyramid, 8 blocks in the second tier, 16 in the third tier, 32 in the fourth tier, how many in the 12 tier?
a. 512 blocks
b. 2048 blocks
c. 4096 blocks
d. 8192 blocks

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.