An oil company fills 1/10 of a tank in 1/4 hour. at this rate, which expression can be used to determine how long it will take for the tank to fill completely?

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 are the possible rational zeros of [tex]f(x) = x^4+2x^3-3x^2-4x+18[/tex]

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)