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4 years ago

7

We have string with a length of 54cm. How many centimeters should we cut off the string so that there would be 3 decimeters left

?

1 answer:

Elina [12.6K]4 years ago

5 0

Answer:

24 centimeters

Step-by-step explanation:

3 decimeters = 30 centimeters

54 cm-30cm= 24 cm

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A zoo has 5 Emperor penguins. The Emperor penguins make up 30%, percent of all the penguins at the zoo. How many penguins live a

Maurinko [17]

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50

Step-by-step explanation:

this can be solved by ratio 15/x = 30/100. Cross multiply and solve for x. The answer is 50.

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3 years ago

A recipe requires 3/8 cup of sugar for each cup of flour used. If a baker uses 10 cups of flour what is the total amount of suga

LekaFEV [45]

Have 3 cups of sugar to 8 cups of sugar that is used.

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3 years ago

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Find . 144 pls help me who ever does first gets brainliest.

lisabon 2012 [21]

Answer:

12

Step-by-step explanation:

The square root of 144 is 12

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3 years ago

For argument's sake let's say that the odds of seeing a black cat are 25% every day. You've not seen one for the past three days

vovikov84 [41]

<h2>Answer:</h2><h2>The chance is 100 % since we have not seen it in the past three days.</h2>

Step-by-step explanation:

The odds of seeing a black cat are 25% every day.

It also means that the possibility of seeing a black cat is once in 4 days, since 25%

Given, we have not seen one black cat in 3 days.

The chance of seeing a black cat on the 4th day = ?

= 100 % since we have not seen it in the past three days.

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4 years ago

A plane traveled 240 miles. The trip was with the wind. It took 3 hours. The trip back was into the wind. The trip back took 6 h

sveta [45]

Answer:

Plane speed is 60 miles/hour

Wind speed is 20 miles/hour

Step-by-step explanation:

Lets suppose the speed of the plane in still air is s and speed of the wind is w and since speed in the formula below equals speed of the plane plus the wind's speed so speed=s+w for this journey with the wind

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

$Distance=Speed*Time$

For the first journey the trip with the wind:

$Distance=Speed*Time\\240=(s+w)(3)\\240/3=s+w\\s+w=80$

Here we got our first equation for the second equation we use the information from the second trip which was into the wind. Which means the speed here would be speed=s-w

$Distance=Speed*Time\\240=(s-w)*6\\240/6=s-w\\s-w=40$

so now we got our two equations adding both equations would result into the following:

$s+w=80\\s-w=40\\2s=120\\s=60$

so speed of the plane is 60 miles/hour put the value of s in any our two equations to calculate the wind speed, lets take the first equation:

$s+w=80\\60+w=80\\w=80-60\\w=20$

so the wind speed is 20 miles/hour

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3 years ago