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Art [367]
3 years ago
9

Sending text messages from Katrina's cell phone costs $0.19 per text message. From last month, she has a credit on her bill for

Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
8 0

Answer:

Katrina will have to pay $21.02 this month.

Step-by-step explanation:

The cost per text message = $0.19

Last month credit = $9.50

The number of text messages sent this month = 158

So, the total cost of 158 texts = 158 x cost per text

= 158 x $0.19  = $ 30.52

So, her total bill = The amount spent on texts - The credit amount

                            = $ 30.52 - $9.50 = $21.02

So, Katrina will have to pay $21.02 this month.

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13. En un pueblo, 5 personas escucharon una noticia. En una hora, cada una de ellas
Vera_Pavlovna [14]

Answer:

En 5 horas se habrá enterado todo el pueblo.

Step-by-step explanation:

Sabemos que en un pueblo 5 personas escucharon una noticia.

Una hora más tarde, cada una de ellas le contó la noticia a otras 5.

Luego, éstas contaron la noticia a otras 5 y así sucesivamente.

Nadie cuenta ni escucha la noticia más de una vez y en ese pueblo hay un poco más de 19000 habitantes.

La ecuación a desarrollar para resolver el problema es la siguiente :

Comenzamos con 5 personas que escucharon la noticia a la ''hora 0''.

Una hora más tarde, cada una de ellas le contó a 5 personas, es decir , pasada la primera hora tendremos :

5+5^{2}=30 (I)

Las 5 personas originales de la ''hora 0'' más 25 personas que se enteraron pasada la primera hora. La ecuación que planteamos es la siguiente :

5^{1}+5^{2}+5^{3}+...+5^{x}>19000 (II)

Buscamos el valor de x que satisface la ecuación (II).

Probando y realizando las sumas encontramos que :

5^{1}+5^{2}+5^{3}+5^{4}+5^{5}+5^{6}>19000

19530>19000

El valor de x que satisface (II) es x=6.

Para hallar el número de horas nos fijamos que en (I) el valor del mayor exponente del 5 es el número 2. Para ese valor 2, el tiempo que pasó es una hora.

Entonces para nuestro x=6, el número de horas que pasaron son 5 horas (1 menos que el valor de x)

Todo el pueblo se habrá enterado en 5 horas de la noticia.

7 0
3 years ago
Of the 200 packages of bagels sold 15 of them are sesame seed bagels what percent of the bagel packages sold are sesame seed bag
Shalnov [3]
15 = x% from 200
<span>15 = </span><span> * 200</span>
15 = 2x                   / ÷ 2 (both sides)
<u>x = 7.5 [percent]</u>
6 0
3 years ago
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If the scale factor of a dilation is 4/3 the image will be a reduction of the pre-image, because 4/3 is a fraction less than one
Law Incorporation [45]
True and sorry if I’m incorrect
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2 years ago
Reduce 8/4 what is the lowest number
nika2105 [10]
The lowest number is 2/1 or 2.

reduce 8/4 to 4/2 which can be reduced to 2/1
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3 years ago
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Label five places in the photo that have a slope.
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Step-by-step explanation

The orange machine, the very end of the shovel part. That line is a slope. The middle part of the scooper could also be a slope. The very beginng part of the scooper is also a slope.  The bottom part of the scooper is also a slope. The bottom part at the end of the scooper could also be slope.

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2 years ago
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