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dezoksy [38]
3 years ago
13

A thunderstorm travels at a constant speed. In 15 minutes , the storm travels 12 miles. If the storm continues to travel at the

same rate, how far would it travel in 90 minutes?
Mathematics
1 answer:
Kitty [74]3 years ago
5 0
You need to multiply
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I don't really understand this Please help.
nekit [7.7K]

Answer:

The first one, third one, fourth one, and sixth one.

Step-by-step explanation:

I hope this helps!

6 0
3 years ago
What is DE? Put the answer below.<br><br> DE =
FinnZ [79.3K]

Answer:

DE = 55

Step-by-step explanation:

As you can see from the red marks showing that the lengths of each triangle are the same, it must also be true that E is equal to 55.

4 0
3 years ago
What is the answer for this question:
Sergio [31]
There are thirty seven seats in total.
5 0
3 years ago
the brain volumes ​(​) of 50 brains vary from a low of to a high of . use the range rule of thumb to estimate the standard devia
Sloan [31]

The estimated standard deviation from the range rule is 145.5 cm3.As it is 29.8 cm3 smaller than the exact standard deviation, we consider that the estimation is not accurate enough.

Generally, brain volumes which are smaller than 921.1 cm3 can be considered significantly low and bigger than 1417.5 cm3 can be considered significantly high. Hence, brain volume of 1457.5 cm3 is bigger than the expected maximum, so it can be considered significantly high.

The calculation goes like this,

According to the range rule, the standard deviation and range, or the distance between the maximum and smallest value, are roughly inversely proportional:

s=R/4

If we have a sample of 50 brains volumes, and they range from 910 cm3 to 1492 cm3, we can estimate the standard deviation as:

s=max-min/4

s=1492-910/4=582/4=145.5

The exact standard deviation is 175.3 cm3.The difference is 175.3-145.5=29.8 cm3, so the estimation is not accurate enough.

The range rule of thumb states that we should anticipate a maximum value that is approximately two standard deviations above the mean and a lowest value that is approximately two standard deviations below the mean. The expected ranges are as follows given our mean volume of 1169.3 cm3 and standard deviation of 124.1 cm3:

Min= M-2s=1169.3-2*124.1=921.1

Max=M+2s=1169.3+2*124.1=1417.5

The brain capacity of 1457.5 cm3 can be regarded as significantly high because it is higher than the predicted maximum.

To know about standard deviation click here :

brainly.com/question/23907081

#SPJ4

5 0
1 year ago
Determine if the statement is always, sometimes, or never true.The opposite angles of a parallelogram are congruent.alwayssometi
ehidna [41]

That's true. Opposite sides of a parallelogram are parallel, which implies that the opposite angles are congruent.

3 0
3 years ago
Read 2 more answers
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