Of all the weld failures in a certain assembly, 85% of them occur in the weld metal itself. a sample of 10 weld failures is examined. assume independence of weld failures.(a) what is the probability that fewer than four of them are base metal failures? (b) what is the probability that at least nine of them are base metal failures? (c) find the mean and standard deviation of the number of base metal failures.

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

The equation of a circle is (x + 4)2 + (y + 6)2 = 16. determine the length of the radius. 10 4 16 8 my flower basket delivers flowers within a 20 mile radius of their store. if this area is represented graphically, with my flower basket located at (5, 2), what is the equation that represents the delivery area? (x - 2)2 + (y - 5)2 = 20 (x - 5)2 + (y - 2)2 = 20 (x + 5)2 + (y + 2)2 = 400 (x - 5)2 + (y - 2)2 = 400

Which of the following can be used to explain a statement in a geometric proof?