.En la venta de navidad se vendieron 100 pinos chicos en un mes de noviembre cuando el precio de cada uno era de 80 pesos. Al acercarse la fecha los pinos aumentan de precio a 150 pesos cada uno, la demanda aumentó y se vendieron 250 pinos

Drag each tile into the correct box. not all tiles will be used. find the tables with unit rates greater than the unit rate in the graph. then tenge these tables in order from least to greatest unit rate

How can i differentiate this equation?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?