The guptas figured out the earth was round by observing lunar eclipses.
a. true
b. false

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Which of the following is true for the relation f(x)=2x^2+1

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?