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4 years ago

Gina has one-third scale model of a three-dimensional solid, meaning that all lengths

Mathematics

1 answer:

nikklg [1K]4 years ago

3 0

Answer:

volume is 540 inches^3

Step-by-step explanation:

The computation of the volume of the full sized solid is given below:

The length would be

$\frac{a}{3}, \frac{b}{3}, \frac{c}{3}$

And, the volume is

$\frac{a}{3} \times \frac{b}{3} \times \frac{c}{3}$

As the volume is given 20 cubic inches

So,

$\frac{abc}{27} = 20\\\\abc = 540 inches^3$

hence, volume is 540 inches^3

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A plumbing supplies manager realises he has a profit margin of 15%. His total sales for a month came $23,000. How much of this i

mart [117]

The percentage of profit margin that
the plumbing supplies manager realizes that he has = 15%
Total sales for the month made by the plumbing supplies manager = $23000
Then
Amount of profit that has been made
by the plumbing sales manager = 15% * 23000 dollars
      = (15/100) * 23000 dollars
   = 15 * 230 dollars
   = 3450 dollars
So the plumbing manager makes a profit of $3450 in the month as can be seen from the above deduction.

6 0

3 years ago

Standard form to slope intercept form <br> 6x+5y=50

cestrela7 [59]

To put it in slope intercept form, you want to solve for y.
5y = -6x + 50
y = -6/5x + 10

So, your slope is -6/5 (or -1.2) and your y-intercept is +10.

6 0

3 years ago

Read 2 more answers

A data mining routine has been applied to a transaction dataset and has classified 88 records as fraudulent (30 correctly so) an

chubhunter [2.5K]

Answer:

The classification matrix is attached below

Part a

The classification error rate for the records those are truly fraudulent is 65.91%.

Part b

The classification error rate for records that are truly non-fraudulent is 96.64%

Step-by-step explanation:

The classification matrix is obtained as shown below:

The transaction dataset has 30 fraudulent correctly classified records out of 88 records, that is, 30 records are correctly predicted given that an instance is negative.

Also, there would be 88 - 30 = 58 non-fraudulent incorrectly classified records, that is, 58 records are incorrectly predicted given that an instance is positive.

The transaction dataset has 920 non-fraudulent correctly classified records out of 952 records, that is, 920 records are correctly predicted given that an instance is positive.

Also, there would be 952 - 920 = 32 fraudulent incorrectly classified records, that is, 32 records incorrectly predicted given that an instance is negative.

That is,

Predicted value

Active value Fraudulent Non-fraudulent

Fraudlent 30 58

non-fraudulent 32 920

The classification matrix is obtained by using the information related to the transaction data, which is classified into fraudulent records and non-fraudulent records.

The error rate is obtained as shown below:

The error rate is obtained by taking the ratio of $\left( {b + c} \right)(b+c)$ and the total number of records.

The classification matrix is, shown above

The total number of records is, $30 + 58 + 32 + 920 = 1,040$

The error rate is,

$\begin{array}{c}\\{\rm{Error}}\,{\rm{rate}} = \frac{{b + c}}{{{\rm{Total}}}}\\\\ = \frac{{58 + 32}}{{1,040}}\\\\ = \frac{{90}}{{1,040}}\\\\ = 0.0865\\\end{array}$

The percentage is $0.0865 \times 100 = 8.65$

(a)

The classification error rate for the records those are truly fraudulent is obtained by taking the rate ratio of b and $\left( {a + b} \right)(a+b)$ .

The classification error rate for the records those are truly fraudulent is obtained as shown below:

The classification matrix is, shown above and in the attachment

The error rate for truly fraudulent is,

$\begin{array}{c}\\FP = \frac{b}{{a + b}}\\\\ = \frac{{58}}{{30 + 58}}\\\\ = \frac{{58}}{{88}}\\\\ = 0.6591\\\end{array}$

The percentage is, $0.6591 \times 100 = 65.91$

(b)

The classification error rate for records that are truly non-fraudulent is obtained by taking the ratio of d and $\left( {c + d} \right)(c+d)$ .

The classification error rate for records that are truly non-fraudulent is obtained as shown below:

The classification matrix is, shown in the attachment

The error rate for truly non-fraudulent is,

$\begin{array}{c}\\TP = \frac{d}{{c + d}}\\\\ = \frac{{920}}{{32 + 920}}\\\\ = \frac{{920}}{{952}}\\\\ = 0.9664\\\end{array}$

The percentage is, $0.9664 \times 100 = 96.64$

8 0

3 years ago

We are holding a 1k walk to raise money for walk across America. This organization provides shoes to people in need. It will be

Sveta_85 [38]

Answer:

The equations y=10x+250 and y=20x represent the situation.

Step-by-step explanation:

Given that:

Cost to rent the park = $250

Cost per person for t-shirt and snack = $10

Cost of participation = $20

y = cost

x = number of people

Cost for the organization;

y = 10x + 250

Amount generated from people's participation

y = 20x

Hence,

The equations y=10x+250 and y=20x represent the situation.

3 0

3 years ago

PLEASE HELP 50 POINTS!!! Jordan is constructing the bisector of MN

4vir4ik [10]

I think its the second one the PLACE THE POINT OF THE COMPASS ON POINT M AND DRAW AN ARC, MAKING SURE THE WIDTH OF THE COMPASS OPENING IS LESS THAN 1/2 MN. This is my opinion only. Thanks!

8 0

3 years ago

Read 2 more answers