Answer:
The probability that exactly one switch is good is

Step-by-step explanation:
The probability that a switch is defective is:

The probability that a switch is not defective is

Therefore, if two switches are selected, the probability that exactly 1 is good is:



10^-4 i think (i’m pretty sure)
To find the vertex we need to represent quadratic function in vertex form.
<span>f(x)=(x-8)(x-2)
</span>f(x)=x²-8x-2x+16=x²-10x+16
f(x)= x²-2*5x+25-25+16= (x-5)² - 9
f(x)= (x-5)² - 9
Vertex is going to be (5, - 9)
$0.75, because she only went over once in January, and twice in February. March was 55 and April was 51. So .25+.50=.75