What is the number in scientific notation? 0.000013 a] 1.3×105 b] 1.3×104 c] 1.3×10−5 d] 1.3×10−4

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

I'm confused on this could anyone me and show me what i need to do to solve it.