James and Arnold each improve their yards by planting rose bushes and geraniums. They bought their supplies from the same store. James spent $81 on 4 rosebushes and 7 geraniums. Arnold spent $170 on 9 roses and 14 geraniums. What is the cost of one rose bush?.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

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.  

10 b/c 5*2 =10

step-by-step explanation:

the answer is:

mean: 6

mad: 2.14