The lenght of the arc of a sector of a circle is given by the formula L=2πRa/360

R is the radius of the circle and a is the central angle in degrees

A)Solve for a

B)Solve for R

C) Find L when R=10in and a=30°.Use π≈3.14

What is the domain of the of the exponential function shown below?

P= price tax is 4% added to the price. which expression shows the total price including tax?

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.