Question

help

Answer 1

what do you think?

Answer 2

idk prolly C

Answer 3

when an irrational number is multiplied by a (non zero) rational number result is an irrational number.
it is D

Answer 4

\[\frac{ 3 }{ 4 } (a~ rational ~number) \times -1.21 (a~rational~number)\]\[=-\frac{ 3.63 }{4 }=-\frac{ 363 }{400}(a~rational~number)\]
B.
x=0.454545...
100x=45.454545...
subtract
99x=45
11x=5
\[x=\frac{ 5 }{ 11 }(a ~rational~number)\]
\[\frac{ 5 }{ 11 }\times (-1.21)=-5\times 1.1=-5.5 (a~rational~number)\]
C.
\[5.21 \times (-1.21)=-6.3041 (a~rational~number)\]
D.
\[-1.21\times \sqrt{17}=-1.21 \sqrt{17}(an~irrational~number)\]