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Tamiku [17]
3 years ago
14

Mary wrote a book of 1536 pages. She numbered all pages by hand. How many times did she write the digit 6?

Mathematics
1 answer:
abruzzese [7]3 years ago
5 0

<em>Hi there!</em>

<em>~</em>

<em>If my logic doesn't fail me here, we have a total of 290 + 145 + 4 = 439 total 6s.</em>

<em>Hope this helped you!</em>

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A car travels at constant speed for 7 days and covers 1500 miles. What is the speed in centimeters/minute? You may use the (appr
zvonat [6]

Answer:

Speed = 23809.52 cm/min      

Step-by-step explanation:

Given : A car travels at constant speed for 7 days and covers 1500 miles.

To find : What is the speed in centimeters/minute

Solution : Formula to find speed is

\text{Speed}=\frac{\text{Distance}}{\text{Time}}

Distance traveled = 1500 miles and time taken = 7 days

\text{Speed}=\frac{\text{1500 miles}}{\text{7 days}}

Now, we have to convert miles into centimeter and days into minutes.

1 day = 24 hours

1 hour= 60 minute

24 hr= 24×60 minute

1 day =  24×60 minute

7 days = 7×24×60 minute = 10,080 minute

Now, 1 mile = 8/5 km = 1.6 km

1 km= 100000 cm

1.6 km = 1.6 × 100000 cm

1 mile = 1.6 × 100000 cm

1500 miles = 1500×1.6 × 100000 cm = 240,000,000 cm

Put back the values into speed

\text{Speed}=\frac{\text{1500 miles}}{\text{7 days}}

\text{Speed}=\frac{\text{240,000,000 cm}}{\text{10,080 minute}}

\text{Speed}=\text{23809.523 cm/minute}

Therefore, speed = 23809.52 cm/min

3 0
3 years ago
Read 2 more answers
10,000 round to the nearest ten thousand
wlad13 [49]

Answer:

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5 0
3 years ago
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You are wakeboarding on a river. You travel 2 miles downstream to a marina for supplies, and then you travel 3 miles upstream to
Zielflug [23.3K]

Let x represent the speed of of boat.

We have been given that the river current is 3 miles per hour.  

The speed of boat upstream will be x-3.

The speed of boat downstream would be x+3.

\text{Time}=\frac{\text{Distance}}{\text{Speed}}

We have been given that you travel 2 miles downstream to a marina for supplies, and then you travel 3 miles upstream to a dock.

We can represent this information in an equation as:

\text{Time}=\frac{2}{x+3}+\frac{3}{x-3}

Since the speed of the boat is 18 miles per hour, so we will substitute x=18 in above equation and solve for time.

\text{Time}=\frac{2}{18+3}+\frac{3}{18-3}

\text{Time}=\frac{2}{21}+\frac{3}{15}

\text{Time}=\frac{2}{21}+\frac{1}{5}

\text{Time}=\frac{2\cdot 5}{21\cdot 5}+\frac{1\cdot 21}{5\cdot 21}

\text{Time}=\frac{10}{105}+\frac{21}{105}

\text{Time}=\frac{31}{105}

\text{Time}=0.295238095

Since time is in hours, so let us convert our given time in minutes.

1 hour = 60 minutes.

\text{Time}=0.295238095\times 60\text{ minutes}

\text{Time}=17.7142857\text{ minutes}

Rounding to nearest tenth of minute.

\text{Time}\approx 17.7\text{ minutes}

Therefore, it will take approximately 17.7 minutes for the boat to take the trip.

3 0
3 years ago
Solve the equation. Round the answer to the nearest tenth.
VMariaS [17]
1,04x+3,14=7,98\ \ \  \ \ | subtract\ 3,14\\\\&#10;1,04x=4,84\\\\&#10;x\approx4,7
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Solve for d <br> 4/5/d=2/15/1/3
Salsk061 [2.6K]

Answer:

d = 1/18

Step-by-step explanation:

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