3. The Macy's Thanksgiving Day parade is famous for its giant balloons. The Cheerios Bee balloon holds 4.044x10'L of He. If the density of He is 0.000178 kg/L, what is the mass, in kg, of the hellum in that balloon? Work: Calculated # sig figs Final Answer with Units

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.

explanation:

0.07 g/cm³

1.37 g/cm³