How many strings of eight uppercase english letters are there? a. if letters can be repeated? b. if no letter can be repeated? c. that start with x, if letters can be repeated? d. that start with x, if no letter can be repeated? e. that start and end with x, if letters can be repeated? f. that start with the letters bo (in that order), if letters can be repeated? g. that start and end with the letters bo (in that order), if letters can be repeated? h. that start or end with the letters bo (in that order), if letters can be repeated?

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.  

required rate of return = 0.166 = 16.6%

step-by-step explanation:

under the capital asset pricing model (capm), the required or expected rate of return for a particular security or asset is given using the formula:

required rate of return = risk-free rate + beta*(market risk premium)

we are given that;

risk-free rate = 4% = 0.04

beta = 1.4

market risk premium = 9% = 0.09

we simply plug these values into the above formula;

required rate of return = 0.04 + 1.4*(0.09)

required rate of return = 0.04 + 0.126

required rate of return = 0.166 = 16.6%