A total of 21 mice are chosen for a research experiment. Of them, 15 are female and the rest are male. They are held inside a 20-gallon tank. If the researcher doesn't know the gender of any of the mice and picks one up at random from inside the tank, what is the probability that the researcher chooses a male mouse? Convert the fraction to a decimal. Round to three decimal places.

89

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

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so

step-by-step explanation:

kekdkckcldlx

answer: b

step-by-step explanation: