I NEED HELP The graph below shows the distance traveled by four cars, A, B, C, and D, over a period of time. Which of the following statements can be concluded from the information on the graph?

A. All cars traveled at least 90 kilometers.

B. All cars traveled at different speeds.

C. All cars traveled for 4 hours.

D. All cars came to a stop, but at different times.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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