Suppose that a firm’s capital is composed of [x]% common equ…

Suppose that a firm’s capital is composed of [x]% common equity and [100-e]% debt; no preferred stock is used. In addition, the before-tax cost of the debt is [b]%, the cost of the equity is [s]%, and the firm’s marginal tax rate is [T]%. The firm’s weighted average cost of capital is? (Express as a percent with two decimal places, without the % sign, e.g., (12.41).

According to a recent study, the carapace length for adult m…

According to a recent study, the carapace length for adult males of a certain species of tarantula are normally distributed with a mean of  mm with a standard deviation of mm.  What is the probability a randomly selected tarantula has a carapace length between 16.5 and 18 mm?

A shipment of steel bars will be accepted if the mean breaki…

A shipment of steel bars will be accepted if the mean breaking strength of a random sample of 10 steel bars is greater than 250 pounds per square inch.  In the past, the breaking strength of such bars has had a mean of  and a standard deviation of  pounds per square inch.  What is the probability that the shipment of 10 steel bars will be accepted?