Suppose that 40 batteries are shipped to an auto parts store, and that 4 of those are defective. a fleet manager then buys 8 of the batteries from the store. in how many ways can at least 3 defective batteries be included in the purchase?

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.