What is the mass number for an atom of xenon containing 54 protons and 75 neutrons?

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Explanation:

Answer should 133

Explanation:

all you have to do is add the protons and neutrons

- both b and d.

-since b and d are the closest coastlines then that makes it the most affected.

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a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.