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larisa86 [58]
3 years ago
12

Aveeno and her boyfriend you know who wrote the bus six times in a month it cost $40 for the two of them each time if Avena alwa

ys paid how much did it cost for the month
Mathematics
1 answer:
MaRussiya [10]3 years ago
4 0

Answer: The cost for the month is $240.

Step-by-step explanation:

Since we have given that

Cost for the two i.e Aveeno and her boyfriend = $40

They were charged 6 times in a month.

As we know that times stands for multiplication.

So, we need to find the cost for the month, where we multiply 6 with $40 to get the amount for the whole month.

So, the amount for the month would be

40\times 6=\$240

Hence, the cost for the month is $240.

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Simplify the expression. 20 • 5–2<br><br><br> 4/5<br><br> 25<br><br> –500<br><br> –200
zhenek [66]

Answer:

4/5

First option is correct.

Step-by-step explanation:

We have been given the expression to solve

20\cdot5^{-2}

We'll use the exponent property x^{-a}=\frac{1}{x^a}

20\cdot5^{-2}=20\cdot\frac{1}{5^2}

Now, square of 5 is 25. Thus, we have

20\cdot\frac{1}{25}

On simplifying, we get

\frac{4}{5}

First option is correct.

5 0
3 years ago
Mateo es un panadero que necesita de cajas grandes para colocar 450 alfajores y 105 empanadas (sin mezclar ambos productos), par
marta [7]

Answer:

Se necesitan 15 cajas para almacenar cada alimento por separado.

Step-by-step explanation:

En este ejercicio necesitamos hallar el Máximo Común Divisor entre la cantidad disponible de alfajores y empanadas, cada una de las cuales se almacenan sin mezclar. Para ello descomponemos factorialmente cada número:

Cantidad de alfajores

450 = 2\times 3^{2}\times 5^{2}

Cantidad de empanadas

105 = 3\times 5\times 7

El Máximo Común Divisor consiste en el factor común de cada uno de los productos de números primos:

M.C.D. = 3\times 5

Entonces, cada caja tiene una capacidad máxima de 7 empanadas o 30 alfajores y se necesitan 15 cajas para almacenar cada alimento por separado.

4 0
3 years ago
Please show work for this problem <br><br><br><br>​
amid [387]

Answer:

Step-by-step explanation:

In 4hours cost is $20

In 1 hour cost should be $5 (20/4)

Cost for 10 hours =10*$5=$50

3 0
3 years ago
How many significant figures does 0.0560 Have
dimaraw [331]
3 significant figures
9 0
3 years ago
A phone charger requires 0.5 A at 5V. It is connected to a transformer with 100 % of efficiency whose primary contains 2200 turn
natita [175]

Answer:

a. 50 turns

b. 0.0114 A

c. 0.25 A, 10 V

Step-by-step explanation:

Given:-

- The required current ( Is ) = 0.5 A

- The required voltage ( Vs ) = 5 V

- Transformer is 100% efficient ( ideal )

- The number of turns in the primary coil, ( Np ) = 2200

- The Voltage generated by power station, ( Vp ) = 220 V

Find:-

a. The number of turns in the secondary coil of the transformer

b. The current supplied by the power station

c. The effect on output current and voltage when the number of turns of secondary coil are doubled.

Solution:-

- For ideal transformers that consists of a ferromagnetic core with two ends wounded by a conductive wire i.e primary and secondary.

- The power generated at the stations is sent to home via power lines and step-down before the enter our homes.

- A household receives a voltage of 220 V at one of it outlets. We are to charge a phone that requires 0.5 A and 5V for the process.

- The outlet and any electronic device is in junction with a smaller transformer.

- All transformers have two transformation ratios for current ( I ) and voltage ( V ) that is related to the ratio of number of turns in the primary and secondary.

                     Voltage Transformation = \frac{N_p}{N_s} = \frac{V_p}{V_s}

Where,

                 Ns : The number of turns in secondary winding

- Plug in the values and evaluate ( Ns ):

                           N_s = N_p*\frac{V_s}{V_p}  \\\\N_s = 2200*\frac{5}{220}  \\\\N_s = 50

Answer a: The number of turns in the secondary coil should be Ns = 50 turns.

- Similarly, the current transformation is related to the inverse relation to the number of turns in the respective coil.

                  Current Transformation = \frac{N_p}{N_s} = \frac{I_s}{I_p}

Where,

                 Ip : The current in primary coil

- Plug in the values and evaluate ( Ip ):

                        I_p = \frac{N_s}{N_p}*I_s\\\\I_p = \frac{50}{2200}*0.5\\\\I_p = 0.0114  

Answer b: The current in the primary coil should be Ip = 0.0114 Amp.

- The number of turns in the secondary coil are doubled . From the transformation ratios we know that that voltage is proportional to the number of turns in the respective coils. So if the turns in the secondary are doubled then the output voltage is also doubled ( assuming all other design parameters remains the same ). Hence, the output voltage is = 2*5V = 10 V

- Similary, current transformation ratio suggests that the current is inversely proportional to the number of turns in the respective coils. So if the turns in the secondary are doubled then the output current is half of the required ( assuming all other design parameters remains the same ). Hence, the output current is = 0.5*0.5 A = 0.25 A

                         

6 0
3 years ago
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