To calculate a rock quality designation (RQD), the valid length of pieces has to be greater than or equal to_ inches O 3 O 4 O 5

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D /5 = Question 8 of 15 < View Policies Current Attempt in Progress Two forces are applied to the construction bracket as shown. Determine the angle which makes the resultant of the two forces vertical. Determine the magnitude R of the resultant. Assume F₁700 lb, F₂ = 460 lb, a = 56° F₁ F2 H ***