Ross wants to conduct a survey of his 400 classmates to determine which candidate for class treasurer, warren or willa, is in the lead in the upcoming election.
ross will ask the question, “if the election were today, which candidate would get your vote? ”
which of the following methods of surveying his classmates will allow ross to make valid conclusions about which candidate is in the lead?
select all that apply.
*ask all of warren's friends.
*ask the other members of willa's cheerleading squad.
*put the names of all the students in a hat, and draw 100 names. ask those students whose names are drawn.
*ask every student in the class.

Put the names of all the students in a hat, and draw 505050 names. Ask those students whose names are drawn.

Step-by-step explanation:

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: