A random sample of 104 light bulbs had a mean life of x−=543 hours x - = 543 h o u r s with a standard deviation of σ=26 hours σ = 26 h o u r s . Construct a 90% confidence interval for the mean life, μ, of all light bulbs of this type.

The volume of a rectangular prism is found by multiplying the length, width, and height of the prism. a rectangular prism has a width of 5x^2units, a length of 7x^3 units and a height of 2x^4 units. which is the volume of the prism in terms of x?