Julie is constructing a scale model of her room the rectangle room is 10 1/4 by 8 inches if 1 inch represents 2 feet of the actual room what is the scale factor and the actual area of the room

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

Combine the information in the problem and the chart using the average balance method to solve the problem.