1.6456 x 10^3 (ten to the third power)
Since the Summer solstice is when the sun is highest in the sky and the solstice is in June, that's your answer :)
The correct answer is B. Compounds put together will form mixtures because compounds itself are pure substances which contains elements and atoms. Mixtures is a system that is made up of two or more substances or compounds which are not combined chemically.