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3 years ago

14

The experimental probability of rain in a certain town is 20 percent. In the next 45 days, how many days can one expect it to ra

in?

1 answer:

Hatshy [7]3 years ago

8 0

9.

hope this helps :)

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Find a1, for the given geometric series. Round to the nearest hundredth if necessary. Sn= 86,830, r= 2.2, n=4

larisa86 [58]

Answer:

4,646.30

Step-by-step explanation:

The sum of n terms of geometric sequence can be calculated using formula

$S_n=\dfrac{a_1(1-r^n)}{1-r}$

In your case,

$S_n=86,830\\ \\r=2.2\\ \\n=4\\ \\a_1=?$

Substitute into the formula:

$S_4=\dfrac{a_1(1-2.2^4)}{1-2.2}\\ \\86,830=\dfrac{a_1(1-23.4256)}{-1.2}\\ \\-104,196=a_1(-22.4256)\\ \\22.4256a_1=104,196\\ \\a_1=\dfrac{104,196}{22.4256}\approx 4,646.30$

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4 years ago

Suppose you sequentially add 10 drops of water to a graduated cylinder and read the volume add 10 more drops read and so on. how

aleksandr82 [10.1K]

It depends on what is being referred to by "this."

The description of the activity is that 10 drops are added twice and two readings are taken. If you do *that* 4 times, then a total of 20*4 = 80 drops will have been added.

If the activity referred to by "this" is the pair of acts {add 10 drops, read the volume}, then four repetitions will have added 10*4 = 40 drops.

Probably the expected interpretation is that "this" is {add 10 drops, read}, so 40 drops is likely the expected answer.

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A rectangle is 4 units long and 2 units wide. What is its area?

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rectangle area = l * w

2 * 4 =

8 units²

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The answer would be B.

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