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sergey [27]
3 years ago
6

How do you determine whether to use 22/7 or 3.14 for π ?

Mathematics
1 answer:
Korolek [52]3 years ago
6 0

Answer:

  Use the value the problem statement tells you. Otherwise, use a better approximation.

Step-by-step explanation:

π ≈ 3.141592653589793238... (a non-repeating infinite decimal)

3.14 = 3.14

22/7 = 3.142857142857_142857

355/113 = 3.14159292035... (a very long repeating decimal)

You can see that the third decimal place is wrong in both of your approximations. The last approximation shown has 7 good decimal digits. A good scientific or graphing calculator will have an internal value for pi that is good to 10 or 12 digits or more (preferably, at least 32 digits).

You should use a value for pi that has at least one more digit of accuracy than the number of significant digits in your answer.

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12<br> Fill in the blank: What's the length of the missing<br> side?<br> Ilype your answer
Kisachek [45]

Answer:

13

Step-by-step explanation:

Using Pythagoras Theorem:

a^2+b^2=c^2

Substitute values of a and b:

5^2+12^2=25+144=169

c^2=169\\c=13

The length of the missing side is 13.

8 0
3 years ago
The formula for interest is I=Prt. Describe what these letters stand for. Is the formula the same if you are charged interest on
prisoha [69]

Answer:

I stand for interest

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7 0
3 years ago
A washer and a dryer cost $770 combined. The washer costs $70 more than the dryer. What is the cost of the dryer?
vazorg [7]
Let w = washer and d = dryer:

w + d = $770,
but w = d + 70, replace w with d+70
(d+70) + d = 770
2d + 70 =770
2d = 770 -70 = 700
and d=$350, then w=350+70 = 420
8 0
3 years ago
NEED HELP ASAP!!!!! WILL GIVE BRAINLIEST!!!!!!!
Mama L [17]
Maybe b or c I guess??
3 0
3 years ago
Read 2 more answers
How do i do x/3=3 Please help!! thanks!!
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If you're looking for "x"

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x= 9
6 0
3 years ago
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