A store buys a coat for $120. If they sell it for $180, why is the percent of change?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?