What number comes next in the pattern and why? 2,3,6,15,42

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

The square root of 9x plus 7 plus the square rot of 2x equall to 7