Lucas is offered either 15% or 21% off his total shopping bill. how much would have to be spent to make 15% option the best one ?

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.

What is another way to express 36 +32

What expression is equivalent to log3(x+4)