Determine the values of aaa and kkk when 299,790,000299,790,000 is written in scientific notation. Enter aaa and kkk, separated by commas.

Let r = 3. what is the value of r + 58?

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.