[will give brainliest]

rstu is a parallelogram. if m∠tuv = 78° and m∠tvu = 54, explain how you can find the measure of ∠srv. show all steps of your work, and refer to any properties of triangles, parallelograms, or triangle congruency theorems as necessary to justify your response.

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Evaluate cos2θ for cosθ = square root of 3/2

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.