Which is the correct symbol for an isotope of bromine with 35 protons and 38 neutrons?

Explanation:

The correct symbol would be

The top number is the atomic mass of this form of Bromine. The bottom number is its position on the periodic table. The 73 is a bit light. Usually the weight is closer to 80.

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2

answer; how far out of place which the object finished relative to the starting location;