If a scale uses 2 cm to represent 6 ft., how many centimeters will be used to represent 21 ft.?

Which of the following is true for the relation f(x)=2x^2+1

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.

Which graph represents an exponential decay function?