How many atoms of gold are present in a 250 kg sample of sylvanite? Group of answer choices

7.18 X 10^25 Au atoms

6.02 X 10^23 Au atoms

5.18 X 10^25 Au atoms

4.49 X 10^26 Au atoms

your answer would be a. 12.5 kg

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.

i believe the answer is true.