I hope its helps you . you can also write 1.44×10^3 it will be better
 
        
             
        
        
        
Answer:
M = 328.70g 
Explanation:
From the given values:
V = 346 cm³
M of 1 cm³ of Polythene = 0.95g or 95/100g
Solve:
 M = <u>(95×346)</u>
 10
 = <u>3</u><u>2</u><u>8</u><u>7</u><u>0</u>
 100
M = 328.70g
 
        
             
        
        
        
By what i know i think that the answer would be A a homogeneous mixture.
 
        
             
        
        
        
The cyclist accelerates from 0 m/s to 9 m/s in 3 seconds with an acceleration of 3 m/s².
Answer:
Explanation:
Acceleration exerted by an object is the measure of change in speed or velocity of that object with respect to time. So the initial and final velocities play a major role in determining the acceleration of the cyclist. As here the initial velocity of the cyclist is the speed at rest and that is given as 0 m/s. Then after 3 seconds, the velocity of the cyclist changes to 9 m/s. 
Then acceleration = change in velocity/Time.

Acceleration = (9-0)/3=9/3=3 m/s².
So the cyclist accelerates from 0 m/s to 9 m/s in 3 seconds with an acceleration of 3 m/s².