What element/compounds are used in the melting of ice?

+= + + balance the equation on coefficients, ex. 1,1,1

Which statement explains which component is likely to be more powerful in explaining a scientific phenomenon? a) component c, because a theory is often passed on possibility and not certainty b) component d, because a hypothesis is often based on possibility not certainty c) component c, because the ability to explain several occurrences in the natural world is a characteristic of a hypothesis d) component d, because the ability to explain several occurrences in the natural world is a characteristic of a theory

Abike ride event is 30 miles. a first aid tent is put at the 3/4 mark of the course. how many miles from the starting point is the first aid tent?