A car salesperson earns 2% on used car sales and 6% on new car sales. The salesperson wants to earn a $7000 commission this month. Write a model that shows the different sales amounts of used and new cars that can be sold to reach the target commission.

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

Roger could feed 5 walruses with 4 kilograms of fish. how many walruses could he feed with 7.2 kilograms of fish?