Which of the following is E ∪ F? D = {x|x is a whole number}
E = {x|x is a perfect square between 1 and 9}
F = {x|x is an even number greater than or equal to 2 and less than 9}

1. {4}
2. {3, 4, 5, 6, 7, 8}
3. {2, 3, 4, 5, 6, 7, 8}
4. {2, 4, 6, 8}

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

You buy five cds at a sale for $5.95 each. write an expression for the total cost of the cds.then use the distributive property and mental math to evaluate the expression.