Amanufacturer of batteries knows that 10% of the batteries produced by a particular production line are defective. a sample of 200 batteries is removed for testing.
a) what is the probability that exactly 20 batteries in the sample are defective?
[2 marks]
b) what is the probability that at least 20 batteries in the sample are defective?
[7 marks]

17 in long 1.3 ft wide and 8in high what is the volume

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)

Someone answer asap for ! a ball is rolled down a ramp. the height, f(x), in meters, of the ball x seconds after it is released is modeled by the function f(x) = x²- 10x + 25 for all values of x from 0 to 5. which statement about the ball is true? a. the maximum height of the ball is 5 meters b. the height of the ball increases from 0 to 5 meters above the ground. c. the ball has traveled 5 meters when it reaches the bottom of the ramp. d. the ball has been traveling for 5 seconds when it reaches the bottom of the ramp