Find the average.
6+4=10
10/2=5
It takes 5 hours
B.
sin^2x + cos^2x =1
hence Sin^2x-1 = - cos^2x
Opposite sides are congruent opposite angles are congruent
<span> The lower and upper bounds of the confidence intervals must be equally distanced from the mean
so it will be
</span><span>70.9 - 73.1
</span>hope it helps
2/3x + 6 = 1/2x + 1/4x ...multiply everything by 12
8x + 72 = 6x + 3x
8x + 72 = 9x
72 = 9x - 8x
72 = x