Based on the diagram, which reason justifies this statement? If ∠CEF is complementary to ∠DCF, then
∠DCF ≅ ∠FEG

Tracy solved the following problem. which of the statements is true? 9 ÷ 3 + 6 × 2 3 + 6 × 2 9 × 2 18 her answer is correct. her answer is incorrect. she should have multiplied before dividing. her answer is incorrect. she should have multiplied before adding. her answer is incorrect. she should have added before dividing.

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?