Need homework due tomorrow! is it correct and need on 9

B. -1

Step-by-step explanation:

I just looked over it quickly, everything looks correct.

To see if a number is in the solution set, plug it in and see if its true:

0 - 9 > -10

-9 > -10

true

-1 - 9 > -10

-10 > -10

false

1 - 9 > -10

-8 > -10

true

2 - 9 > -10

-7 > -10

true

The only solution that doesn't work is B. -1

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

false

step-by-step explanation:

false.   two legs of the trapezoid would be congruent, but the other two would not.   were all the legs congruent, then we'd have a square; were the 2 shorter sides congruent and the 2 longer sides also congruent, we'd have a rectangle.