Mrs. Crown gave a typing test to her students. She recorded each student's average typing speed, in words per minute. The dot
plot below shows the recorded data
Average Typing Speed
20
22
24 26 28 30 32
Words Per Minute
34
36
Which of the following is the best measure of variability for the data?
A
interquartile range
B. mean absolute deviation
median
D. mean

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.

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.

explanation:

step-by-step explanation: