A pure tone has a frequency of 1500 hertz (cycles per second). The maximum pressure P produced from the tone is 2 millipascals. Write a sine model that gives the pressure P (in millipascals) as a

function of the time t (in seconds).

Please need help

Multiply. −2x(6 x 4 −7 x 2 +x−5) express the answer in standard form. enter your answer in the box.

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.

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.