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satela [25.4K]
3 years ago
9

Przeciętny orzeł waży 1,68 kg, a przeciętny wróbel - 25 g. Mózg orła waży 14 g, a mózg wróbla - 1 g. Oblicz, jakim procentem mas

y każdego z tych ptaków jest masa jego mózgu.
Mathematics
1 answer:
suter [353]3 years ago
6 0

Answer:

Eagle - 0.83%

Sparrow - 4%

Step-by-step explanation:

1. On average, the weight of the eagle is 1.68 kg. Its head weighs 14 g.

Then

1.68 kg = 1,680 g - 100%

14 g - x%

Write a proportion:

\dfrac{1,680}{14}=\dfrac{100}{x}

Cross multiply:

1,680x=1,400\\ \\x=\dfrac{1,400}{1,680}=\dfrac{70}{84}=\dfrac{10}{12}=\dfrac{5}{6}\approx 0.83\%

2. On average, the weight of the sparrow is 25 g. Its head weighs 1 g.

Then

25 g - 100%

1 g - x%

Write a proportion:

\dfrac{25}{1}=\dfrac{100}{x}

Cross multiply:

25x=100\\ \\x=\dfrac{100}{25}=4\%

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OleMash [197]

Answer:

12 nickles

Step-by-step explanation:

24 dimes = $2.40

12 nickles = .60

$2.40 + .60 = $3.00

6 0
3 years ago
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Janna drank 0.7 liter of water before soccer practice and 0.70 liter of water after practice compare the two decimals using grea
maria [59]
0.7 Liters and 0.70 Liters are the same amount.

You can think of them as fractions:  7/10 and 70/100.  Both of these mean the same.  7/10 is the simplest form of the number.

When you put zeros to the right of any number that is to the right of the decimal point, it will not change the value of the number.

0.7 L = 0.70 L
5 0
3 years ago
astronomers estimate that there are about 10 to the power of 11 galaxics in the universe and that each galexy contains about 10
nika2105 [10]

Answer:

10^22

Step-by-step explanation:

= (10^11)(10^11) -> the bases are the same, add the exponents

= 10^22

3 0
1 year ago
Pat picked a card from a standard deck, looked at it, and then put it back. He then picked a second card. What is the probabilit
AlekseyPX

Answer: 17/52

Step-by-step explanation:

There are 52 total cards in a standard deck.

The number of diamonds in a deck of cards is 13 and there are 4 jacks in a deck of cards.

So the propabibilty of Pat picking a diamond is 13/52 and the probability of Pat picking a jack is 4/52. Now you have to add the two probabilities together.

You do not remove any digits because Pat put the card back into the deck, he didn't take it away. So we do not take away from the total

13 + 4 = 17

You do not need to change the denominator cause 52 is the same.

So 17/52 is the probability of Pat picking a diamond or a jack

I hope this helped!

3 0
3 years ago
Can you put these number from least to greatest?
Eva8 [605]

The correct order would be:

5/64 x 3, 1/16 x 3, 3/32 x 4, 11/64 x 4, 7/16 x 3, 3/4 x 2, 3/8 x 4, 1 7/8 x 4, 2.25 x 2, 1.5 x 4, 3 3/8 x 3, 3.75 x 3

First we have to take all of the numbers and do the multiplication. It's often easiest to turn them in to decimals so that you have a common form.

3/32 x 4 = 3/8 = .375

3/4 x 2 = 3/2 = 1.5

1 7/8 x 4 = 15/4 = 3.75

2.25 x 2 = 4.5

1.5 x 4 = 6

3/8 x 4 = 3/2 = 1.5

5/64 x 3 = 5/32 = .156

3.75 x 3 = 11.25

1/16 x 3 = 3/16 = .1875

7/16 x 3 = 21/16 = 1.31

3 3/8 x 3 = 81/8 = 10.125

11/64 x 4 = 11/16 = .687

Now we can use those to put in order.

5/64 x 3 = 5/32 = .156

1/16 x 3 = 3/16 = .1875

3/32 x 4 = 3/8 = .375

11/64 x 4 = 11/16 = .687

7/16 x 3 = 21/16 = 1.31

3/4 x 2 = 3/2 = 1.5

3/8 x 4 = 3/2 = 1.5

1 7/8 x 4 = 15/4 = 3.75

2.25 x 2 = 4.5

1.5 x 4 = 6

3 3/8 x 3 = 81/8 = 10.125

3.75 x 3 = 11.25

Which if you are looking for without the extra terms, you can check the answer at the top.

5 0
3 years ago
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