# Questions & Answers

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- Solve the Quadratic Equation 4x²-5x-12=0
- A hurricane wind blows across a $6.00 \,m\times 15.0\, m$ flat roof at a speed of $130\, km/h$. Is the air pressure above the roof higher or lower than the pressure inside the house? Explain.
- Find the area of the parallelogram with vertices A(-3, 0), B(-1, 5), C(7, 4), and D(5, -1)
- Where is the greatest integer function f(x)= ⌊x⌋ not differentiable? Find a formula for f’ and sketch its graph.
- Find the length and width of a rectangle that has the given area and a minimum perimeter.
- Consider a binomial experiment with n=20 and p=0.70.
- The missing number in the series 9, ? , 6561, 43046721 is: 81, 25, 62, 31, 18.
- Can two events with nonzero probabilities be both independent and mutually exclusive?
- The joint density of x and y is f(x y)=c(x^2-y^2)e^{-x}. Find the conditional distribution of Y, given X=x.
- The graph of a function f is shown. Which graph is an antiderivative of f?
- Determine whether each of these functions is a bijection from R to R.
- Based on the normal model N(100, 16), describing IQ scores. What percent of people’s IQ would you expect to be: