You have $30 to spend on rolls of neon crepe paper and packages of sparkly streamers for a party. Neon crepe paper will cost $2.50 per roll and sparkly streamers will cost $1.50 each.

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.

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?

Which of the following parabolas opens down?