Prove that (e^ix-e^-ix) / 2i = sinx

Find the exact area of a circle having the given circumference. 8 A = 4√2 16 64

Two sets of data are each symmetrical and do not contain outliers. Which measures of center and variability would be most effective to use when making comparisons between the two data sets? A. mean and MAD B. mean and IQR C. median and MAD D.

If $55 is put in an account that gets 6% and i add $20 at the end of each year, how much will i have at the end of 10 years?

A cube has width of 8 cm. What is the volume of the cube?!

Find the mean and median of the data. 4.7,8.51,6.5,7.42,9.64,7.2,9.3

Marketing estimates that a new instrument for the analysis of soil samples will be very successful, moderately successful, or unsuccessful, with probabilities 0.3, 0.3, and 0.4, respectively.

Find the roots of the following equations. a) 4x+9=34 b) (x-4) (x+2) = 0 c) 2x^2-6x+4=0

6 · 14 - (9 + 8) 2 =

Skylar drove 280 miles in 5 hours. If she continued at the same rate, how far would she travel in 20 hours?

Simplify the following expression. (9x + 2) + 5x