- Can the time span between time 0 and 10^-43 second be expressed in exponential notation?

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Hey everyone! I need some help on a math problem. What is the exact value: Sin(Cos^-1(5/6)-tan^-1(1/3)).? 144.5 rounded to it's nearest tenth? Find the area of the region between the curves x=1−y2 and x=y2−1. I'm a little confused because of the x= not y= and still can't figure it!? Calculate the exact area bounded by the x-axis and the graph of y=28−11x+x2.? Find the indicated probability.
μ = 4.6; σ = 2.2
P(3 ≤ x ≤ 6) (Show work? I'm so confused)?