What is the equation of the line through point (3,4) and perpendicular to y= -2x-4

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Who long does it take to drive 150 miles at 45 miles per hour

Adc is formed by reflecting abc across line segment ac, as shown in the figure. if the length of ac is 4 units, the area of adc square units. it wont let me put the picture but its a triangular pyramid thats abcd