Answer:
1.28/7. 2.-17/7. 3.-11/-3. 4.not sure. 5. cant remeber rest
17.94 You are multiplying 4.6 x 0.9
You could sit down with several pencils and a whole pad of paper, and
divide Leda's mass by Europa's mass. But it's probably good enough
to provide an answer that's correct to 2 or 3 significant figures, and
there's a much easier way to do that:
Leda's mass . . . . approx. 1.094 x 10¹⁶
Europa's mass . . . . approx. 4.8 x 10²²
Leda's mass is about (1.094 x 10¹⁶) / (4.8 x 10²²) of Europa's mass.
(1.094 x 10¹⁶) / (4.8 x 10²²) = 2.28 x 10⁻⁷
Leda's mass is approx. <em>0.000 000 228</em> of Europa's mass.
h=-16t^2+148t+30
find the derivative:
h = -32t+148
0 = -32t+148
-32t=-148
t = -148/-32 = 4.625 seconds
h=-16(4.625)^2+148(4.625)+30 = 372.25
height = 372.25 feet, time = 4.63 seconds