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3 years ago

Fourteen of the 32 students in the class are boys. What is the ratio of boys to girls in the class?

Mathematics

1 answer:

AleksAgata [21]3 years ago

8 0

The ratio would be "14:28"

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A culture of yeast doubles in size every four hours. If the yeast population is estimated to be three million now, what will it

Bess [88]

It doubles every 4 hours, so after 24 hours there will be 6 doublings.
2^6 = 64
So, the population will be (3,000,000 * 64) or 192,000,000 in 24 hours.
The answer is B.

4 0

3 years ago

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Guy ran at 13 km/hr. what was guys speed in MPH?

Assoli18 [71]

The guy ran at a speed of 8.07783 MPH

Here's how I got my answer:

1 km/hr. = 0.621371

So, if you do $0.621371 * 13$ you will get your answer: 8.07783 MPH

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3 years ago

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Your goal is to take at least 10,800 steps per day. According to your pedometer, you have walked 7370 steps. Write and solve an

faust18 [17]

Answer:

Step-by-step explanation:

Let the numbers of steps you can take to reach your goal be x

Your goal is to take at least 10,800 steps per day and you have walked 7370 steps already.

x + 7370 >= 10800

x >= 10800 - 7370

x >= 3430

3 0

3 years ago

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Find the slope of the line passing through the points<br> (-6,-5) and (4,4)

marshall27 [118]

Answer:

$\frac{9}{10}$

Step-by-step explanation:

The slope formula is $m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

Here, $x_{1}$ is -6, $x_{2}$ is 4, $y_{1}$ is -5, and $y_{2}$ is 4.

$m=\frac{4+5}{4+6}$

$m=\frac{9}{10}$

So, the slope of the line passing through the points (-6,-5) and (4,4) is $\frac{9}{10}$ .

3 0

3 years ago

It is estimated that world reserves of oil currently stand at 2625

seraphim [82]

Answer:

35.4 years

Step-by-step explanation:

The annual consumption (in billions of units) is described by the exponential function ...

f(t) = 45.5·1.026^t

The accumulated consumption is described by the integral ...

$\displaystyle\int_0^t{f(x)}\,dx=45.5\int_0^t{1.026^x}\,dx=45.5\left(\dfrac{1.026^t-1}{\ln{1.026}}\right)$

We want to find t such that the value of this integral is 2625, the estimated oil reserves.

2625 = 45.5/ln(1.026)·(1.026^t -1)

2625·ln(1.026)/45.5 +1 = 1.026^t ≈ 1.480832 +1 = 1.026^t

Taking natural logs, we have ...

ln(2.480832) = t·ln(1.026)

t ≈ ln(2.480832)/ln(1.026) ≈ 35.398

After about 35.4 years, the oil reserves will run out.

4 0

2 years ago