GROUP NUMBER ELEMENT
Potassium
Fluorine
Silicon
Radon
Gold
Beryllium
Oxygen
Neon
Rubidium
Tungsten
Arsenic
Calcium
Sodium
Aluminum
Chromium
Iodine
Helium
Nitrogen
Iron
Zinc

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Potassium group number is 1, Fluorine group number is 17, Silicone group number is 14, Randon group number is 18, Gold group number is 11, Beryllium group number is 2, Oxygen group number is 16, Neon group number is 18, Rubidium group number is 1, Tungsten group number is 6, Arsenic group number is 15, Calcium group number is 2, Sodium group number is 1, Aluminum group number is 13, Chromium group number is 6, Iodine group number is 17, Helium group number is 18, Nitrogen group number is 15, Iron group number is 8, and Zinc group number is 12

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.

3 1/4 %

explanation: