Select the proper placement for parentheses to speed up the addition for the expression 2+9+8+1
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Answer:
(8+2) and (9+1) is the most fastest adding pair.
Step-by-step explanation:
It is easy to add zero digit number here it will be
We can club the two number or we can club two pair so as to form 10 in each of the pair
It will be (8+2) which gives 10
And (9+1) which gives 10
And it will very easy and fast to add 10 + 10
Rather than any other pair.
Related Questions
The sum of a number times 2 and 22 is at least 19.
The length of a rectangular poster is 3 inches less than the width. The perimeter is 38 inches. Find the length
tina and jim work at a different car wash. tina is paid $37 per day plus 1.50 for each car she washes. jim is paid $40.00 per day plus 1.00 for each car she washes.write an expression that represents the amount tina is paid each day given the number of cars she washes. I put 37+1.5cwrite an expression that represents he amount jim is paid each day given the number of cars he washes. I put 40+1.00c Did I do this correct???
Simplest form for 1.4/7
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Spend a couple of minutes looking at a right triangle, and reviewing the definitions of sin and cos, and you'll see why.
So in this case:
cos(42)=sin(48)
As:
A complementary angle is either of two angles whose sum is 90 degrees. {Source: Google}
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The minimum sample size required to estimate a population proportion or percentage is 306.
What is random sampling?
In statistics, a simple random sample is a subset of individuals chosen from a larger set in which a subset of individuals are chosen randomly, all with the same probability. It is a process of selecting a sample in a random way.
In order to determine the minimum sample size required to estimate a population proportion or percentage, we will use the following formula:
n = (z×p×q)/m²
where is the minimum sample size, z is the z-score corresponding to the desired confidence level, p is the population proportion, q is 1-p, and m is the desired margin of error.
In this case, the confidence level is 95%, so the corresponding z-score is 1.96. Since we don't know the population proportion, we will use the symbol p and q to represent it. Therefore, the formula becomes:
n = (1.96×p×q)/(0.04)²
To determine the minimum sample size, we need to determine the value of p and q. Since p + q = 1, if we set p to 0.5, then q will also be 0.5. Therefore, the minimum sample size is:
n = (1.96×0.5×0.5)/(0.04)² = 306.25
≈ 306
Therefore, the minimum sample size required to estimate a population proportion or percentage is 306.
Learn more about the random sample here:
brainly.com/question/12719656.
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The maximum value of p-hat*q-hat occurs where p-hat = .5 (found by taking the derivative of (p-hat)*(1-p-hat) and setting it equal to 0 to find the maximum. n = ( 2.5762( for 99% confidence interval)÷.0482 )*.5*.5 = 720.028 or 721
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Answer: 0.0727
Step-by-step explanation:
We can use the concept of probability:
In this case, we have 9 red marbles and 24 blue marbles, so the total number of marbles is 9 + 24 = 33.
Since there are 9 red marbles out of 33 total marbles, the probability of drawing a red marble on the first draw is 9/33.
There will be 8 red marbles left out of the remaining 32 marbles in the jar. So, the probability of drawing a second red marble after the first red marble is 8/32.
To find the probability of both marbles being red, we multiply the probabilities of the fractions together. (9/33) * (8/32).
Now let's round the answer to 4 decimal places!
(9/33) * (8/32) ≈ 0.0727
Therefore, the probability that both marbles drawn are red would be 0.0727. Sorry if it's nonsense, I'm just an average 6th Grader : D
Final answer:
The probability of pulling out 2 red marbles from the jar is approximately 0.0727.
Explanation:
To find the probability of pulling out two red marbles from the jar, we need to calculate the probability of pulling out a red marble on the first draw and then a red marble on the second draw.
The probability of pulling out a red marble on the first draw is 9/33, since there are 9 red marbles out of a total of 33 marbles. After the first marble is removed, there are now 8 red marbles left out of a total of 32 marbles. So, the probability of pulling out a red marble on the second draw is 8/32.
To find the probability of both events happening, we multiply the probabilities together: (9/33) * (8/32) = 0.0727 (rounded to 4 decimal places).
Learn more about Probability here:
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