The masses (in grams) of pennies minted in the United States after 1982 are normally distributed with a mean of 2.50 g and a standard deviation of ~0.02 g. Find the percent of these pennies that have a mass between 2.44 g and 2.56 g.

___% of these pennies have a mass between 2.44 g and 2.56 g.

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.

i believe that the answer is

b. y-1=-2(x-4)

hope this !

60°

step-by-step explanation:

the measure angle of c in an isosceles triangle abc is 60° because in isosceles triangle,the measures of all the angles is 60°.