The mass of a sample of the chemical element Einsteinium-253 after it is initially measured is represented by the following table. Time( weeks)=
0
3
6
9
12
15

Mass(grams)=
400
201
98
50
24
12

Which model for M(t), the mass of the sample t weeks after it’s initially measured, best fits the data?

Choose 1 answer=
A= M(t)=400•(0.5)^ t
B= M(t)=400•(0.79)^ t
C=M(t)=400-200• t
D=M(t)=400-12• t

Scenario: susan wants to make 2 square flags to sell at a crafts fair. the fabric she wants to buy is 3 meters wide. she doesn't want any fabric left over. what's the least amount of fabric she should buy? question: which equation will susan solve her problem? note: let x represent the length of 1 side of the flag. options: 1) 2x^2 = 4x 2) 8 +2x = 2(4x) 3) 2 * 2 = 4 * 2 4) 4x^2 -2x = 0