It cost a company $250 a week to operate all the equipment needed brake tshirts and S5 for each tshirt The t-shirts are sold for $15. How many tshiris would the
company have to sell in a week for their revenue to exceed their costs?

whatever you can spend with $11.53 or under.

step-by-step explanation:

20 - 8.47 = 11.53. take away the money he used for lunch from the starting amount of 20.

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.  

i think it might be a but you might want a second opinion