Carlene is selling t-shirts for a fundraiser. the t-shirts cost $20.50 each. to date, she has raised $800. her goal is to raise more than $10,640. how many more t-shirts, x, does carlene need to sell to reach her goal?

Write an explicit formula that represents the sequence defined by the following recursive formula:

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.

If 20% of a number is 35, what is 50% of that number?