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mrs_skeptik [129]
3 years ago
9

Solve 3(3×2) in a rectangular array ​

Mathematics
2 answers:
mihalych1998 [28]3 years ago
6 0
54

3(3) = 9
3(2) = 6
9(6) = 54
nikklg [1K]3 years ago
5 0

Answer: 18

Step-by-step explanation:

3(3)(2)

=(3)(6)

=18

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A board is 12 feet long. If the board is divided into 12 equal sections, how long is each section?
SIZIF [17.4K]
12 feet divided by 12 is equal to 1 foot ]
therefore a 12 foot long board divided into 12 equal sections has 12 1 foot long sections
6 0
3 years ago
A cheese processing company wants to estimate the mean cholesterol content of all one-ounce servings of a type of cheese. The es
Mrrafil [7]

Answer:

The minimum sample size required to construct a 95% confidence interval for the population mean is 65.

Step-by-step explanation:

We are given the following in the question:

Population standard deviation,

\sigma = 3.10\text{ milligrams}

We need to construct a 95% confidence interval such that the estimate is within 0.75 milligrams of the population mean.

Thus, the margin of error must me 0.75

Formula for margin of error:

z_{critical}\times \dfrac{\sigma}{\sqrt{n}}

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

Putting values, we get,

0.75 = 1.86\times \dfrac{3.10}{\sqrt{n}}\\\\\sqrt{n} = \dfrac{1.96\times 3.10}{0.75}\\\\\sqrt{n} = 8.101\\\Rightarrow n = 65.63\approx 65

Thus, the minimum sample size required to construct a 95% confidence interval for the population mean is 65.

5 0
3 years ago
You're going on a 1211-mile trip, and your car gets about 29 miles per gallon. Gas prices along your route average $3.40. Estima
Vilka [71]

Answer:

Using the estimate:

The car has to go for 1,200 miles but it consumes a gallon of gasoline for every 30 miles. The number of gallons it will need is therefore:

= 1,200 / 30

= 40 gallons

Each gallon costs $3.00 so the total cost is:

= 40 * 3

= $120

Without using the estimate:

The car has to go for 1,211 miles but it consumes a gallon of gasoline for every 29 miles. The number of gallons it will need is therefore:

= 1,211 / 29

= 41.76 gallons

Each gallon costs $3.40 so the total cost is:

= 41.76 * 3.40

= $‭141.98

<em>Using the estimate provides a lower cost of gasoline for the trip. </em>

3 0
3 years ago
What different symbols do i use for at least at most exceeds no more than etc
AleksandrR [38]

Answer:

yltkh

Step-by-step explanation:

ewgeg

6 0
3 years ago
Read 2 more answers
on field day, 1/10 of the students in Mrs. Brown's class competes in jumping events, 3/5 of the student competes in running even
hjlf
1/10 + 1/10 = 2/10
10 / 5 = 2
3/5 = 6/10
2/10 + 6/10 = 8/10
10/10 - 8/10= 2/10
6 0
3 years ago
Read 2 more answers
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