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Oxana [17]
3 years ago
15

19.25 tons = lbs and explain how you get the answer

Mathematics
1 answer:
4vir4ik [10]3 years ago
5 0

1ton=1,000kg\to19.25\ tons=19.25\cdot1,000\ kg=19,250\ kg\\\\
\begin{array}{ccc}1\ lb&-&0.454\ kg\\\\x\ lb&-&19,250\ kg\end{array}\ \ \ \ \ |cross\ multiply\\\\0.454x=19,250\ \ \ \ \ |:0.454\\\\x\approx42,401\\\\Answer:\ 19.25\ tons\approx42,401\ lbs

More precisely.

1\ kg\approx2.2046\ lb\\\\\text{therefore}\\\\19,250\ kg=19,250\cdot2.2046\ lb=42,438.55\ lb

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Como hago para calcular el porcentaje de unos datos agrupados , porfa ayuda no entiendo. osea tipo : tengo que calcular cual es
KatRina [158]

Answer:

Falta información para darte una respuesta exacta, así que voy a dar una explicación general de este tipo de problemas.

Querés saber cuál es el porcentaje de personas que trabajan y están en el rango de edades entre 31 y 46.

Entonces lo primero que tenemos que hacer es encontrar el número total de personas que trabajan, digamos que es T (esto es el 100%)

Luego hay que encontrar el número total de personas que trabajan y tienen entre 31 y 46, digamos que es N.

Podemos relacionar estas cantidades con porcentajes de la siguiente manera:

N = P

T = 100%

Donde P es el porcentaje que queremos calcular.

Si tomamos el cociente de esas dos ecuaciones, obtenemos:

N/T = P/100%

Resolviendo para P obtenemos:

(N/T)*100% = P

El porcentaje de personas que trabajan y tienen entre 31 y 46 va a ser entonces:

P = (N/T)*100%

Así sabiendo el número total de personas que trabajan y el número de personas que trabajan y además tienen edades entre 31 y 46, podemos calcular el porcentaje que queremos.

Particularmente decis que no sabes si colocar 3% o 4%.

Lo que podria implicar que tambien quizas tengas un problema de redondeo.

Si tenes un numero como:

3.a%

donde a es un digito entre 0 y 9

si a es menor que 5, entonces redondeamos para abajo, y asi obtenemos:

3.a% = 3%

si a es igual a 5 o mayor, redondeamos para arriba, asi obteniendo:

3.a% = 4%.

4 0
3 years ago
four students spent $12 on school lunch at this rate find the amount 10 students would spend on the same school lunch
gregori [183]
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3 years ago
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How many pounds of $2.4/lb trail mix should a grocer combine with 5 lb of $1.5/lb trail mix to get $1.9/lb trail mix?
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4
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3 years ago
The options are 0.106,0.63,0.51,0.53
Luba_88 [7]
That would be  (20+30+56)/200  =   106/200   = 53/100 Answer
7 0
4 years ago
Read 2 more answers
Help ASAP thank you
sergey [27]

Answer: Choice A

g(x) = sqrt(2x)

====================================================

Explanation:

"sqrt(x)" is shorthand for "square root of x"

f(x) = 3x^2 is given

g( f(x) ) = x*sqrt(6) is also given

One way to find the answer is through trial and error. This would only apply of course if we're given a list of multiple choice answers.

------------------

Let's start with choice A

g(x) = sqrt(2x)

g( f(x) ) = sqrt(2 * f(x) ) .... replace every x with f(x)

g( f(x) ) = sqrt(2 * 3x^2 ) .... plug in f(x) = 3x^2

g( f(x) ) = sqrt(6x^2 )

g( f(x) ) = sqrt(x^2 * 6)

g( f(x) ) = sqrt(x^2)*sqrt(6)

g( f(x) ) = x*sqrt(6)

We found the answer on the first try. So we don't need to check the others.

------------------

But let's try choice B to see one where it doesn't work out

g(x) = sqrt(x + 3)

g( f(x) ) = sqrt( f(x) + 3)

g( f(x) ) = sqrt(3x^2 + 3)

and we can't go any further other than maybe to factor 3x^2+3 into 3(x^2+1), but that doesn't help things much to be able to break up the root into anything useful. We can graph y = x*sqrt(6) and y = sqrt(3x^2 + 3) to see they are two different curves, so there's no way they are equivalent expressions.

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3 years ago
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