Un tonel de vino está llena hasta los 4/5 de su capacidad. Se saca la mitad del vino que contiene. Si la capacidad del tonel es de 80 litros, ¿ cuántos litros quedan en el tonel? a) 50
b) 48
c) 42
d) 32

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.

My math teacher told my class to "steal" a 6th grade fraction word problem from the internet, word problems? : -p requirements: only a 1 step word problem. needs to be complex.

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?