Boron (B) has two Isotopes, boron-10 and boron-11. The atomic weight of boron is the A. combined masses of boron-10 and boron-11

B. average number of neutrons in boron-10 and boron-11

C. weighted average of the masses of boron-10 and boron-11

D. mass of boron-10 minus the mass of boron-11

C. is the correct answer

Explanation:

I just completed this question and got it correct.

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.

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'