Three samples of iron with masses of 1.12 grams, 1.8 grams, and 1.562 grams were mixed together. The combined mass of the three samples,
expressed to the correct number of significant figures is

A) 4.4 grams
B) 4.48 grams
C) 4.5 grams

Need answer quickly

i have a feeling this is a gay person trolling to make straights look bad.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

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