The Turbine Oil Oxidation Test (TOST) and the Rotating Bomb Oxidation Test (RBOT) are two different procedures for evaluating the oxidation stability of steam turbine oils. An article reported the accompanying observations on x = TOST time hr and y = RBOT time min for 12 oil specimens. TOST 4200 3575 3750 3700 4050 2770 4870 4500 3450 2675 3750 3300
RBOT 370 340 375 310 350 200 400 380 285 220 345 280

Required:
Calculate the value of the sample correlation coefficient. Round your answer to four decimal places. r =

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

multiple all that

step-by-step explanation:

27×17

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x