А man
receives a R4800 Christmas bonus in his
first year of work. Every year his bonus increases
by a fixed amount.
What is the annual increase if he receives a total of
RI43 500 in bonuses over a 20 years period?​

step-by-step explanation:

it will be a cylinder. with a diameter of 8 and 4 single pieces high

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.  

a and c

step-by-step explanation: