2 years ago

In a bag of 50 marbles, 20 marbles are blue or pink.

Mathematics

1 answer:

Scorpion4ik [409]2 years ago

8 0

Answer:

40%

Step-by-step explanation:

The ratio is 20:50, we can expand to 40:100, so 40%

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What is the greatest number that rounds to 500 when rounded to the nearest ten?

andriy [413]

I believe the answer is 549.

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2 years ago

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The digits of a two-digit number differ by 3. If the digits are interchanged, and the resulting number is added to the original

Zanzabum

Answer:

The original number could be 85.

Step-by-step explanation:

Let the 2 digits be x and y.

Let the number be xy then, assuming that x is the larger digit:

x - y = 3.

x = y + 3

Also

10y + x + 10x + y = 143

Substituting for x:

10y + y + 3 + 10(y + 3) + y = 143

22y + 33 = 143

22y = 110

y = 5.

So x = y + 3 = 8.

6 0

3 years ago

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A culture started with 1,000 bacteria. After 3 hours, it grew to 1,100 bacteria. Predict how many bacteria will be present after

ss7ja [257]

The general equation for exponential growth can be written as:
$x_{t} = x_{0} (1+r)^{t}$
where r is the growth rate.
Plugging in the given values, we get:
$1100=1000(1+r)^{3}$
Therefore
$(1+r)^{3}=1.1$
giving
$1+r= \sqrt[3]{1.1} =1.0323$
The predicted number of bacteria after 17 hours is given by:
$1000(1.0323)^{17}=1716$

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3 years ago

. Find the area of a square with a side of 2v3.

Vlad1618 [11]

Answer:

$area = 2 \sqrt{3} \times 2 \sqrt{3} \\ = 4( { \sqrt{3} })^{2} \\ = 4 \times 3 \\ = 12 \: {units}^{2}$