Answer:
By the late 1970s, the dance had begun to spread to other communities and was gaining wider popularity; at the same time, the dance had peaked in popularity among African Americans and Puerto Ricans. A practitioner of this dance is called a b-boy, b-girl, breakdancer or breaker.
Around a 60, that’s a lot of math right now
The social contract principle was introduced during the Enlightment era due to the contribution of both Jean-Jacques Rousseau and John Locke's work and ideas.
The principle describes how the power of a state resides on its citizens, who can grant it to political representatives that are elected through suffrage. Hence, citizens give up their share of state power (their individual rights). In turn, the elected representatives would propose and implement policies on their behalf. This principle is the base of modern representative democracies.
I believe that would be a Semitone.