Asupermarket is testing brands of microwave popcorn. for each brand, they recorded the percentage of corn kernels in a package that popped in the recommended cooking time. let a be the data set of percentages listed below. a = {91, 94, 89, 93, 87, 92, 86, 87, 92, 91} the supermarket then realized they missed a brand. when the new brand was cooked, only 74% of its kernels popped. let b be the data set of percentages for all 11 packages, including the package where the least kernels popped. select the statements that are true.

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:

the weight of the object inside the box!

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