Referring to Q3, suppose that the standard deviation of the random deviation 휖is 350 psi. a. What is the probability that the observed value of 28-day strength will exceed Assignment 9Student Name: ID: Section:pg. 25000 psi when the value of accelerated strength is 2000? (5 marks)b. Repeat part (a) with 2500 in place of 2000. (3 marks)c. Consider making two independent observations on 28-day strength, the first for anaccelerated strength of 2000 and the second for x = 2500. What is the probability that thesecond observation will exceed the first by more than 1000 psi? (5 marks)d. Let Y1and Y2denote observations on 28-day strength when x =x1and x =x2, respectively. By how much would x2have to exceed x1in order that P(Y2>Y1) =.95

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α.part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part bsuppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i. e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part cnow try a numerical problem. what is the direction of the vector w = < -1, 6 > ?