Question 10. The value of the real number "t" for which the two vectors a =3i +tj and b = 12i-20j are parallel is

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

Write the expression 7x^3-28xy^2 as the product of 3 factors

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters