X⁴ - 81 = x⁴ - 9² (Difference of 2 squares, then we an write it:
(x²-3)(x²+3) =0, → then (x²-3) = 0 and (x²+3)=0
(x²-3) = 0 → x² = 3 → x = +√3 and x = -√3
(x²+3) =0 → x² = -3 → x = +√-3 and x = -√3→ or i√3 AND x = -i√3
A{ -3 , +3 , -i√3 , i√3}
Answer:
Triangular Pyramid
Step-by-step explanation:
The appropriate price is
(150 ft)*(($0.15/in)*(12 in/ft)) = $270.00
Apparently, the factor (12 in/ft) was left out of the computation, so the charge was for $0.15 per foot.
a) The price was not correct. The correct price was $270.00
b) The mistake was charging by the foot rather than by the inch.
Answer:
6.9
Step-by-step explanation:
sin(52)=x
x=7sin(52)
Remember the exponential law that says
therefor
the answer is C
