As he attempted to spell the word receive, tim reminded himself "i before e except after c." tim's self-reminder best illustrates the use of: a. trial and error. b. insight. c. an algorithm. d. a heuristic.

D. a heuristic.

Step-by-step explanation: Heuristic is the use of simple mental shortcuts to solve problems and make decisions quickly and efficiently without spending a lot of time thinking about the problem and how to solve it.

In this case, Tim uses the simple trick of reminding himself that "i" comes before "e" except after "c", without spending time to actually remember or memorize the correct spelling of the word.

the answer is 48m^2!

step-by-step explanation:

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.