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Feliz [49]
4 years ago
5

Josh is mixing together concrete to build a brick wall. He's made 6 gallons of concrete with a mixture of 50% water. The instruc

tions on the bag of concrete say the mixture should be made of 65% water. How much water should be added to make the mixture 65% water (round to the nearest hundredth)?
Mathematics
1 answer:
katrin2010 [14]4 years ago
3 0

Answer:

15%.,..........,..............,.......,..............,...........

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En un día de temporal de lluvia el meteorólogo dijo en las noticias que la probabilidad de que lloviera ese día era del 70%. ¿Qu
drek231 [11]

Answer:

Vamos a definir:

100% probabilidad de lluvia = Es seguro que ese día va a llover.

0% probabilidad de lluvia = Es seguro que ese día no va a llover.

Ahora, los valores intermedios admiten una dualidad, es decir, es posible que llueva o que no.

Particularmente en el caso del 70% significa que:

Si tenemos un dado de 10 caras, con los números {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

Y lo tiráramos, los resultados {1, 2, 3, 4, 5, 6, 7} indicarían que llueve.

Los resultados {8, 9, 10} indicarían que no llueve.

Entonces es mas probable que llueva, pero la probabilidad de que no llueva no es despreciable.

5 0
3 years ago
A telecommunication company has 7 satellites, two of which are sending a week signal. If two are picked at random without replac
Setler [38]
2/7 is the probability that the first satellite sends a weak signal. That leaves 6, one of which sends a weak signal. So the probability that the second also sends a weak signal is 1/6. Combine these and we get 2/7×1/6=1/21.
5 0
3 years ago
I REALLY NEED HELP!!!!!!!!!!!!
guajiro [1.7K]

Answer: 64 centimeters squared.

Step-by-step explanation: This shape is a parallelogram. And the area of a parallelogram is just the base multiplied by the height. Here, the base is 10 cm and the height is 7 cm. So you might think the the area is just 70 centimeters squared. But here's the catch. There is a rectangular region in this parallelogram that is not shaded. But you can still easily solve this problem. All you need to do is find the area of that rectangular region and you already know the length and the width of this region. And, remember, the area of a rectangle is just the length and the width multiplied. So here, the area of that rectangular region is just 2 cm multiplied by 3 cm. Which will give you 6 centimeters squared. Now, all that's left to do is subtract the area of that rectangular region, 6 centimeters squared, from the total area of the parallelogram, 70 centimeters squared. And that should give you 64 centimeters squared as your final answer. I really hope this makes sense and is helpful.

8 0
3 years ago
Fractions from 6 to 7, with an interval of between each pair of fractions
EastWind [94]

Answer:

6.7

Step-by-step explanation:

3 0
3 years ago
PLEASE ANSWER ASASP!!!!!!!!!!!
Rufina [12.5K]

Answer:

She would no reach her goal.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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