At which three points x1, x2, and x3 closest to x=0 but with x> 0 will the displacement of the string y(x, t) be zero for all times? these are the first three nodal points. express the first three nonzero nodal points as multiples of the wavelength λ, using constants like π. list the factors that multiply λ in increasing order, separated by commas.

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

Consider the following equation -167 + 37 = 49 - 21p select the equation that has the same solution as the given equation. o a. p - 5 + ip = 7 - p ob. +55 + 12p = 5p + 16 c. 2 + 1.25p = -3.75p + 10 d. -14 + 6p = -9 - 6p reset next

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.