6/root of 12. Rationalize the denominator

If you roll two fair dice (one black die and one white die), in how many ways can you obtain a 4 on at least one die?

)a smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters (depth). what is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

Y=4x^2+x-1 solve using quadratic formula