NDA2018MathematicsBasics of MathematicsActual
If (0.2)^x=2 and ₁₀ 2=0.3010 , then what is the value of x to the nearest tenth?
Options
- A-10.0
- B-0.5
- C-0.4
- D-0.2
Correct answer
C. -0.4
Step-by-step solution
(0.2)^x=2 Taking on both sides, aligned & x ₁₀ 2 10 = ₁₀ 2 & x [ ₁₀ 2- ₁₀ 10 ]= ₁₀ 2 & x[0.3010-1]=0.3010 & x=- 0.3010 0.6990 -0.43 aligned