What is the image of (4, 3) after a dilation by a scale factor of 2 centered at the origin?

Anyone know these questions? i need ,.

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cot of 61.6

Ethan is proving that the slope between any two points on a straight line is the same. he has already proved that triangles 1 and 2 are similar. drag statements and reasons to complete the proof.