13. A soil sample near Chernobyl was found to contain 187 kBq/m² of cesium-137. If the half-life of cesium-137 is approximately 30 years, how much cesium-137
will remain in the sample after 90 years?
(A) 93.50 kBq/m²
(B) 23.38 kBq/m²
(C) 6.23 kBq/m²
(D) 1.58 kBq/m2

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dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.