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Lunna [17]
3 years ago
11

Select the proper placement for parentheses to speed up the addition for the expression 4 + 6 + 5 

Mathematics
2 answers:
nata0808 [166]3 years ago
6 0
Im guessing that by making 10 it will speed up the addition process so it should be 
B since (6+4) = 10 then +5 =15
vlabodo [156]3 years ago
6 0
The answer is B becuase 6+4=10 10+5=15
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What is the cube root of 512m^12n^15?<br> -16m^4n^5<br> -8m^5n^4<br> 8m^4n^5<br> 16m^5n^4
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Disney World offers an incentive on their opening day.
myrzilka [38]

Answer:

Step-by-step explanation:

The answer would be to find the LCM of both 3 and 5, which is 15. The 15th customer would receive both a mug and a t-shirt. Let's call mugs "x" and shirts "o" and line them up. The bold x's and o's are the lucky winners:

x  x  x  x  x  x  x  x  x  x  x  x  x  x  x

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As an aid to the establishment of personnel requirements, the director of a hospital wishes to estimate the mean number of peopl
GenaCL600 [577]

Answer:

n = 66.564

Step-by-step explanation:

  1. Because the population is unknown, we will apply the following formula to find the sample size:

n= (\frac{zS}{E} )^{2}

Where:

z = confidence level score.

S = standard deviation.

E = error range.

   2. We will find each of these three data and replace them in the formula.

"z" theoretically is a value that measures how many standard deviations an element has to the mean. For each confidence level there is an associated z value. In the question, this level is 99%, which is equivalent to a z value of 2.58. To find this figure it is not necessary to follow any mathematical procedure, it is enough to make use of a z-score table, which shows the values ​​for any confidence interval.

The standard deviation is already provided by the question, it is S = 100.

Finally, "E" is the acceptable limit of sampling error. In the example, we can find this data. Let us note that in the end it says that the director wishes to estimate the mean number of admissions to within 1 admission, this means that she is willing to tolerate a miscalculation of just 1 admission.

Once this data is identified, we replace in the formula:

n=(\frac{(2.58)(100)}{1} )^{2}

    3. The corresponding mathematical operations are developed:

n=(\frac{258}{1} )^{2}

n= (258)^{2}

n= 66.564

4 0
3 years ago
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