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1. 0.817643 = rational or irrational
2. √88 rational or irrational
3. √169 rational or irrational
4. Estimate √58 to the nearest integer.
Help! Thank you!
 one year ago
 one year ago
1. 0.817643 = rational or irrational 2. √88 rational or irrational 3. √169 rational or irrational 4. Estimate √58 to the nearest integer. Help! Thank you!
 one year ago
 one year ago

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hbaBest ResponseYou've already chosen the best response.1
Do you have an intuition about rational and irrational number ?
 one year ago

Yolo4mecuiteBest ResponseYou've already chosen the best response.0
What is that supposed to mean
 one year ago

hbaBest ResponseYou've already chosen the best response.1
What is your mother toungue ?
 one year ago

Yolo4mecuiteBest ResponseYou've already chosen the best response.0
That makes no sense
 one year ago

hbaBest ResponseYou've already chosen the best response.1
Let me rephrase it for you, Do you know what a rational and irrational number is ?
 one year ago

AravindGBest ResponseYou've already chosen the best response.0
any number with terminating decimals is a rational number ,but those numbers having notterminating(maybe repeating) decimals are irrational numbers.
 one year ago

hbaBest ResponseYou've already chosen the best response.1
Is pi a rational or irrational number ?
 one year ago

AravindGBest ResponseYou've already chosen the best response.0
i hope you understand it now :)
 one year ago

hbaBest ResponseYou've already chosen the best response.1
So, 0.817643 is rational or irrational ?
 one year ago

hbaBest ResponseYou've already chosen the best response.1
See, 0.5 =1/2 so rational.
 one year ago

Yolo4mecuiteBest ResponseYou've already chosen the best response.0
Thanks anyways I got it
 one year ago

phiBest ResponseYou've already chosen the best response.0
rational means you can write it down as a decimal. irrational means the decimals keep going, never repeating, no rhyme or reason for what the next decimal will be pi is a good example. roots (in general) are irrational unless they are roots of perfect squares. example square root of 4 is 2 but sqrt(5) is irrational. btw, same idea for cube roots, etc...
 one year ago

phiBest ResponseYou've already chosen the best response.0
The trick part in these questions is recognizing that a number is a perfect square. 169 is 13*13, so the square root of 169 is 13, and rational
 one year ago

phiBest ResponseYou've already chosen the best response.0
88 is 2*44 or 2*2*2*11 and so sqrt(88)= sqrt(2*2*2*11)= sqrt(2*2)*sqrt(2*11)= 2sqrt(22) and sqrt(22) is irrational, and 2 times an irrational is still irrational.
 one year ago

phiBest ResponseYou've already chosen the best response.0
4. Estimate √58 to the nearest integer. Are you allowed a calculator? Or did they give you a way to do this problem?
 one year ago

phiBest ResponseYou've already chosen the best response.0
find the square root, and round to the nearest whole number. to round, look at the digit in the tenths place (next to the decimal point) if 4 or less, drop the decimals and that is the answer if 5 or bigger, drop the decimals, but ADD 1 to the answer example: 100.3 to the nearest integer is 100 (3 is 4 or less, so drop the decimals) 210.50013 to the nearest integer is 210+1 (because 5 is 5 or bigger) you get 211
 one year ago

Yolo4mecuiteBest ResponseYou've already chosen the best response.0
Alrighty thank you
 one year ago

phiBest ResponseYou've already chosen the best response.0
if you are not allowed a calculator, write down the squares near 58 7*7 is 49 58 is between them 8*8 is 64 58 is 9 away from 49 and 6 away from 64. so 58 is closer to 64 than it is to 49 that is a clue that sqrt(58) is closer to 8 than to 7
 one year ago
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