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oee [108]
2 years ago
6

Austin is on the swim team. Each week he swims a total of 3000 meters. How many kilometers does he swim each week?

Mathematics
1 answer:
marishachu [46]2 years ago
8 0

Answer:

3 km

Step-by-step explanation:

<em>(NOTE: One kilometer is 1000 meters)</em>

Divide 3000 by 1000 to get 3

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The value of r? Do not round your answer.
bearhunter [10]

Answer:

r = 31.2

Step-by-step explanation:

Δ ACE and Δ BCD are similar, thus the ratios of corresponding sides are equal, that is

\frac{AE}{BD} = \frac{CE}{CD}, substitute values

\frac{r}{19.5} = \frac{64}{40} ( cross- multiply )

40r = 1248 ( divide both sides by 40 )

r = 31.2

8 0
3 years ago
En una caja de cartón se empacan 400 latas de atún al acomodarlas resultan que caben 5 latas más a lo largo que a lo ancho y a l
Anvisha [2.4K]

Answer:

Hay 50 latas en total que tocan el fondo de la caja.

Step-by-step explanation:

Una caja de cartón es representada por un cuadrilátero, cuyas caras son rectángulos. Si la caja esta ocupada por completo, entonces la cantidad total de latas es representada por la siguiente expresión:

n_{V} = n_{w}\cdot n_{h}\cdot n_{l} (1)

Donde:

n_{V} - Total de latas de atún, adimensional.

n_{w} - Cantidad de latas de atún a lo ancho de la caja, adimensional.

n_{h} - Cantidad de latas de atún a lo alto de la caja, adimensional.

n_{l} - Cantidad de latas de atún a lo largo de la caja, adimensional.

De acuerdo con el enunciado, tenemos las siguientes relaciones:

n_{V} = 400 (2)

n_{l} = n_{w} +5 (3)

n_{h} = n_{w}+3 (4)

Si aplicamos estas fórmulas a (1), tenemos el siguiente polinomio de tercer orden:

n_{w} \cdot (n_{w}+5)\cdot (n_{w}+3) = 400

n_{w}\cdot (n_{w}^{2}+8\cdot n_{w}+15) = 400

n_{w}^{3}+8\cdot n_{w}^{2}+15\cdot n_{w} -400 = 0

Este polinomio se puede resolver por vía analítica por el Método de Cardano o por vía numérica, sus raíces son:

n_{w,1} = 5, n_{w,2} = -6.5+i\,6.144, n_{w,3} = -6.5-i\,6.144

En consecuencia, la única solución válida es n_{w} = 5 y las variables restantes son por (3) y (4):

n_{l} = 10 y n_{h} = 8

La cantidad de latas que tocan el fondo de la caja es igual al producto de la cantidad de latas a lo largo de la caja y la cantidad de latas a lo ancho de la caja, es decir:

n_{A} = n_{w}\cdot n_{l} (5)

n_{A} = (5)\cdot (10)

n_{A} = 50

Hay 50 latas en total que tocan el fondo de la caja.

4 0
2 years ago
a paper factory makes 8415 sheets of paper and 45 minutes how many sheets of paper does the factory make in one minute
lesantik [10]
Do 8415 divided by 45 which is 187


4 0
3 years ago
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17 20 13 5 30 13 6 15 median
fiasKO [112]
The median is 14.......

5 0
3 years ago
If you were to randomly survey 500 people each from the two largest US cities, would this be a random sample? Why or why not?​
Usimov [2.4K]

Answer:

hmmmm

Step-by-step explanation:

Yes. If the selection is random, it would be idetified as a random selection. This is only if the largest cities were chosen.

6 0
2 years ago
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