After Ken’s funeral, his wife Helen decided to offer his collection of CDs to members of his local Jazz Club. As there were so many CDs, it was not possible to take all of them to the first meeting of the club; so 60% of the collection was put into a box, from which members could take the ones they wanted. By the end of the meeting half of these had been taken. A week later, a further 30% of the original collection was added to the box. During this meeting, three quarters of the CDs in the box were taken. At the third meeting, the rest of the collection was added to the box. There were now 40 CDs for the members to choose from. How many CDs were there in the original collection?

i think it is 70

step-by-step explanation:

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.

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.  

step-by-step explanation:

the true ones are a b and d