It is almost the end of the grading period. i have 730 out of 880 points so far in my math class which means i currently have a b (83%).there are 90 points remaining before grades come out. my teacher rounds each student's score to the nearest percent. what is the fewest number of points i need to get and end up with a grade of c (at least 70%) b (at least 80%) a ( at least 90%)

the radius is 2 times the diameter.

step-by-step explanation:

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

is there more info provided? there is not enough information given in the problem