1 xạ thủ có 3 viên đạn khả năng bắn chúng bia là 0,8.xạ thủ bắn từng viên cho đến khi trùng bia hoặc hết đạn thì dừng. gọi x là số viên đạn được bắn. phương sai của nó là:

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step-by-step explanation:

step-by-step explanation:

bob the banana

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.