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kolbaska11 [484]
3 years ago
14

The pilot of a hot air balloon drops an object over board at a height of 3000 feet name the expression 16t2 represents the dista

nce in feet that the object falls in t seconds until the object hits the ground find the distance in feet the object falls in 6 seconds
Mathematics
1 answer:
Alex787 [66]3 years ago
3 0
96t^2 is the distance represents in feet that the object falls in 6 seconds
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A recent survey based on a random sample of n=470 voters, predicted that independent candidate for the mayoral election will get
julsineya [31]

I have an expression

\sigma = \sqrt{p(1-p)/n}

floating around in my head; let's see if it makes sense.

The variance of binary valued random variable b that comes up 1 with probability p (so has mean p) is

E( (b-p)^2 ) =  (-p)^2(1-p) + (1-p)^2p = p(1-p)

That's for an individual sample. For the observed average we divide by n, and for the standard deviation we take the square root:

\sigma = \sqrt{p(1-p)/n}

Plugging in the numbers,

\sigma = \sqrt{.24(1-.24)/490} = 0.019 = 1.9\%

One standard deviation of the average is almost 2% so a 27% outcome was 3/1.9 = 1.6 standard deviations from the mean, corresponding to a two sided probability of a bit bigger than 10% of happening by chance.

So this is borderline suspect; most surveys will include a two sigma margin of error, say plus or minus 4 percent here, and the results were within those bounds.

7 0
3 years ago
Katrina wants to build a fence around her square garden. Her garden has an area of 121 square feet. How much fencing will Katrin
Luba_88 [7]

121 \div 2 = 11
each side equals 11
11 \times 4 = 44
katrina needs 44 ft of fence
4 0
3 years ago
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Is my answer right? I think it’s A, but I don’t want to get it wrong.
never [62]
The answer is 16 if you solve it, because the square root of 64 is 8 and 2 * 8 = 16
5 0
3 years ago
Find the quotient and simplify​
soldi70 [24.7K]

Answer:

\large\boxed{\dfrac{n^2}{4}}

Step-by-step explanation:

\dfrac{n^2+2n}{4}\div\dfrac{n+2}{n}=\dfrac{n(n+2)}{4}\cdot\dfrac{n}{n+2}\\\\\text{cancel}\ (n+2)\\\\=\dfrac{n}{4}\cdot\dfrac{n}{1}=\dfrac{n^2}{4}

4 0
3 years ago
Round 14.57 to nearest whole number
Galina-37 [17]
14.57 rounded to the nearest whole number is..... 15
8 0
2 years ago
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