Liz makes a large amount of purple paint by mixing red and blue paint in the ratio 3: 7. red paint cost £20 for a 3litre tin. blue paint costs £30 per 3litres.

Little’s law firm has just one lawyer. customers arrive randomly at an average rate of 6 per 8 hour workday. service times have a mean of 50 minutes and a standard deviation of 20 minutes. how long does a customer spend at little’s law firm on average?

What is the missing constant term in the perfect square that starts with x^2 -20x

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?