It is claimed that at least 40% of all shoppers at a shopping mall enter a particular department store. a random sample of 14 shoppers at the mall was selected. if the null hypothesis p = 0.40 is tested against the alternative that the null hypothesis will be rejected at ? = 0.01 if of the 14 shoppers enter the store.

a. at least 2
b. at most 10
c. at least 11
d. at most 1

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct

step-by-step explanation: hi!