Q8. Find sech-1(x) given that cosh y eye- -y
2
A. sech-1(x) = ln2 + V1 – x2 = ln|x|
B. sech-'(x) = In|1 - V1 - x? - In|x|
C. sech-1(x) = In|2 + V1 - x?] + In|x|
D. sech-'(x) = ln|1 + V1 – x2) - In|x|​

Tracy solved the following problem. which of the statements is true? 9 ÷ 3 + 6 × 2 3 + 6 × 2 9 × 2 18 her answer is correct. her answer is incorrect. she should have multiplied before dividing. her answer is incorrect. she should have multiplied before adding. her answer is incorrect. she should have added before dividing.

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

6cm10 cma conical paper cup has dimensions as shown in the diagram. how much water can the cup hold when full?