Which group of items all contain a transparent part with at least one curved surface to refract light? an owl's eye, a smart phone, and a magnifying glass a microscope, a camera, and a window pane. an electron microscope, safety goggles, and eyeglasses a human eye, a diving mask, and a telescope

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.