Here are the atomic masses of hypothetical elements: X = 13. 25 amu

Y = 69. 23 amu

Z = 109. 34 amu

What is the % composition by mass of Y in the hypothetical compound

with formula X2Y5Z3?

Enter your answer to two decimal places. Do not include the % sign, just

the numerical answer.

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.