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Arlecino [84]
3 years ago
10

Each student in a pottery class is responsible for cleaning the area around his or her workspace at the end of the lesson. Each

student's area is approximately 4 and 1/2ft. There are 13 students in the class. Assuming that each student cleans his or her area, how many square feet in total is cleaned? Use addition to rewrite the fraction, and multiply using the distributive property.
Mathematics
1 answer:
ELEN [110]3 years ago
3 0

Answer:

your answer is 58 sq. ft.

Step-by-step explanation:

4 1/2 × 13

Covert the mixed number into an improper fraction

4 1/2 = 9/2

Then make 13 into a fraction

13/1

Now multiply the fractions

<u>9 × 13</u>  =  <u>117</u>

2 × 1    =    2

Next change the improper fraction into a mixed number

58 1/2

Next change it into a decimal

58.5

Lastly round it and we have the answer

58  

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drek231 [11]

Answer:

-6

Step-by-step explanation:

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2 years ago
A package contains 12 resistors, 3 of which are defective. If 4 are selected, find the probability of getting
s344n2d4d5 [400]

Answer:

Incomplete question, but I gave a primer on the hypergeometric distribution, which is used to solve this question, so just the formula has to be applied to find the desired probabilities.

Step-by-step explanation:

The resistors are chosen without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by the following formula:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}

In which:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

In this question:

12 resistors, which means that N = 12

3 defective, which means that k = 3

4 are selected, which means that n = 4

To find an specific probability, that is, of x defectives:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}

P(X = x) = h(x,12,4,3) = \frac{C_{3,x}*C_{9,4-x}}{C_{12,4}}

7 0
3 years ago
Look at this picture and answer plz
gogolik [260]

Answer: First top box is 2400, 2nd top box is 120

423x6 = 2400 + 120 +18 = 2538

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
The Tour de France is a bike race around the country of France. The bike race is a three week race that covers approximately 2,2
valentinak56 [21]

Answer:

Approximately 54.54% of race happened in the first week.

Step-by-step explanation:

We are given the following in the question:

Length of bike race in three weeks = 2,200 miles

Race covered in first week = 1,200 miles

Percentage of race covered in first week =

=\dfrac{\text{Race covered in first week}}{\text{Total length of race}}\times 100\%\\\\=\dfrac{1200}{2200}\times 100\%\\\\=54.54\%

Thus, approximately 54.54% of race happened in the first week.

4 0
2 years ago
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