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3 years ago

A regular decagon is mapped onto itself every time it is rotated

1 answer:

4 0

Not sure if this is true or false but if you rotate the decagon 45 degrees it is mapped onto itself every time. So if this is true or false it is true.

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Ok, so I gotta find the area for these rooms, but its not clear where the rooms end.. Where would you guys say the living room e

notsponge [240]

Measure your foot size then go to the wall barefooted and walk in a straight line to the door the wall to wall the against the wall then add

8 0

3 years ago

Read 2 more answers

17. Which of the following is the correct formula for finding power in a DC circuit? A. P = I2R B. P = VR C. P = IR D. P = V2I

netineya [11]

Answer:

Choice A. P = I² · R where

P is the power in the DC circuit,
I is the current through the circuit, and
R is the total resistance of the circuit.

Step-by-step explanation:

Electrical power is the rate at which the electrical force does work. So what is electrical work? That's the work $W$ that the electrical force do when it moves charges $Q$ across a potential difference $V$ :

W = $V\cdot Q$ .

The power is the rate at which the electrical force do the work:

$\displaystyle P = \frac{W}{t} = V \cdot \frac{Q}{t}$ .

On the other hand, current $I$ is the charge through a cross-section of the circuit in unit time. By the definition of current:

$\displaystyle\frac{Q}{t} = I$ .

$\displaystyle P =V \cdot \frac{Q}{t} = V\cdot I$ .

Consider Ohm's Law:

$V = I \cdot R$ .

Therefore

$\displaystyle P = V\cdot I = (I \cdot R) \cdot I = I^{2}\cdot R$ .

6 0

3 years ago

Read 2 more answers

1. x² + 2xy – 7 xy + 4y?<br>Input your answer here:

viktelen [127]

collect the like terms:

Solution: x^2-5xy+4y

P.S

get the photo math app. :)

Hope that helps.

6 0

3 years ago

Can you help thank you ???????

Dmitry_Shevchenko [17]

Answer:

L = 186

Step-by-step explanation:

84 - 60 = 24

210 - 24 = 186

8 0

2 years ago

Read 2 more answers

An ice cream store has the pricing shown below. You want to determine the best value. The height of the cone is 4.5 in and the d

nignag [31]

Solution:

Step 1:

We will calculate the volume of ice cream in the single scoop

The volume of the ice cream will be

$\begin{gathered} V=\frac{1}{3}\pi r^2h+\frac{2}{3}\pi r^3 \\ r=\frac{2in}{2}=1in(cone) \\ h=4.5in \\ r=\frac{3in}{2}=1.5in(radius\text{ of the hemisphere\rparen} \end{gathered}$

By substituting the values, we will have

$\begin{gathered} V=\frac{1}{3}\pi r^{2}h+\frac{2}{3}\pi r^{3} \\ V=\frac{1}{3}\times\frac{22}{7}\times1^2\times4.5+\frac{2}{3}\times\frac{22}{7}\times1.5^3 \\ V=\frac{33}{7}+\frac{99}{14} \\ V=\frac{165}{14} \\ V=11.79in^3 \end{gathered}$

Step 2:

We will use the formula below to calculate the volume of the two scoops of ic cream

$\begin{gathered} V=\frac{1}{3}\pi r^2h+\frac{4}{3}\pi r^3 \\ V=\frac{1}{3}\times\frac{22}{7}\times1^2\times4.5in+\frac{4}{3}\times\frac{22}{7}\times1.5^3 \\ V=\frac{33}{7}+\frac{99}{7} \\ V=\frac{132}{7} \\ V=18.86in^3 \end{gathered}$

Step 3:

We will use the formula below to calculate the volume of the three scoops of ic cream

$\begin{gathered} V=\frac{1}{3}\pi r^2h+\frac{6}{3}\pi r^3 \\ V=\frac{1}{3}\times\frac{22}{7}\times1^2\times4.5+2\times\frac{22}{7}\times1.5^3 \\ V=\frac{33}{7}+\frac{297}{14} \\ V=\frac{363}{14} \\ V=25.93in^3 \end{gathered}$

For the first ice cream with one scoop

$\begin{gathered} 1in^3=\frac{3.50}{11.79} \\ 1in^3=\text{ \$}0.30 \end{gathered}$

For the second ice cream with two scoops

$\begin{gathered} 1in^3=\frac{4.50}{18.86} \\ 1in^3=\text{ \$}0.24 \end{gathered}$

For the third ice cream with three scoops

$\begin{gathered} 1in^3=\frac{5.50}{25.93} \\ 1in^3=\text{ \$}0.21 \end{gathered}$

Hence,

The final answer is

The triple sold at $5.50 has the best value because it has the lowest price of $0.21 per cubic inch of the ice cream

3 0

1 year ago