If the mass of a proton is 2.34 × 10–14 grams, what is the mass of 1,000 protons?

question options:

2.34 × 10–17 g

2.34 × 10–12 g

2.34 × 10–11 g

2.34 × 10–13 g

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What are “like terms”? why can we only add like terms?

Having a hard time understanding this question (see attachment).

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?