2) (2.8 x 102) x (3 x 104) Strategy One: Strategy Two:

Powers of 10:

Standard Form:

3) (12 x 105) x (9 x 10-2) Strategy One:

Strategy Two:

Powers of 10:

Standard Form:

9987

step-by-step explanation:

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0

you need to upload the picture of the circle.

step-by-step explanation:

answer: 1 box of pens at the store ? ? pens in the box