Determine whether the function is one-to-one.f(x) = 
A. One-to-one
B. Not one-to-one
Answer: B
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Find the sum.18 + 6 + 2 + 
+ . . .
A. 27 B. 26 C. - 9 D. Does not exist
Find the present value. Round to the nearest cent.To get $6500 after 6 years at 7% compounded quarterly
A. $2,213.65 B. $4,331.22 C. $4,361.36 D. $4,286.35
Use the dimensions in the illustration to find w, the width of the river, if src="https://sciemce.com/media/3/ppg__cognero__Section_9.5_Congruent_Triangles_and_Simliar_Triangles__media__9381e946-933c-4326-a63b-2c09fa0ada8e.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_a91bfae55c98422b85218cd61" />.
?
, 
, and 
?
A. 64
B. 80
C. 
D. 
E. none of these
A welder has four pieces of scrap steel angle of lengths 
ft, 
ft, 
style="vertical-align:-9px;" varid="variable_id_field" variablename="impvar_959d086398da4420b710dc333" class="wirisformula" /> ft and 
ft. If they are welded together, how long is the welded piece?
A. 
ft
B. 
ft
C. 
ft
D. 
ft
E. 
ft