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Damm [24]
3 years ago
12

A person on a moving sidewalk travels 21 feet in seven seconds. The moving sidewalk has a length of 180 feet. How long will it t

ake to move from one end of the sidewalk to the other?
Mathematics
2 answers:
rodikova [14]3 years ago
8 0
60 seconds is the right answer
Kruka [31]3 years ago
7 0
56 seconds because 21 goes into 180 8 times. 7 multiplied by 8 is 56, so 56 is your answer.
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Can you ever use a calculator to determine if a number is rational or irrational?
timofeeve [1]
A rational number is simply a term that can be expressed as a fraction. Otherwise, that is an irrational number. So, you can use a calculator to verify if the number is rational or not.

The key characteristic of an irrational number is when it contains a long line of decimal places. For example, the term π and the Euler's number e are irrational numbers. The exact values of π and e are 3.14159 and <span>2.71828182846, respectively. In reality, those decimal places go on a long way. Particularly, </span>π<span> has a total of 2.7 trillion digits. Numbers inside radicals or roots can also be irrational numbers. For example </span>√3 is irrational because it is equal to 1.732050808. However, not all radicals are irrational. For example √15.3664 is equal to 98/25 or 3.92. That is a rational number. So, therefore, use the calculator to know the exact value of the term to properly distinguish rational from irrational.
3 0
3 years ago
(-3)-(-19) I got -22 am I right?
N76 [4]

Answer:

16

Step-by-step explanation:

the negative outside the parenthesis removes the negative that is with the 19 and it is going to be 19-3 which equal 16


4 0
3 years ago
Read 2 more answers
Can someone help me on this math question pls I have 12 more questions I need help on too !
love history [14]

A is the answer. Since they will both be divided by 4 due to the same amount of points, because Globrite has a greater range, it will have a greater mean. Glo brite also ranges bigger than Luminate

5 0
3 years ago
Jen is planning a trip to France. The exchange rate is 3 Euros for $4. How many Euros will she get if she exchanged $28? DO NOT
Nonamiya [84]
The answer would be 21 euros
8 0
3 years ago
PLEASE HELP
Liono4ka [1.6K]
You can solve for sides of a triangle using the following equation. 

A = arccos (b^2 + c^2 - a^2/2bc)

And likewise for other variables by moving the letters. 

Ultimately, in this problem you get the following angle measures:

15.87
23.97
140.16
8 0
3 years ago
Read 2 more answers
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