What is the slope of a line perpendicular to a line with slope 3/4

if you was gonna solve for a, a is a   < -12

for this case we have that by definition, the volume of a cylinder is given by:

where:

r: it's the radio

h: it's the height

we have as data that:

substituting:

so, the cylinder volume is

option d

simple 80 pieces in 1 sercing so 80*47=3760+20=3780