Answer:
ECB
Step-by-step explanation:
I noticed they looked exactly the same.
Answer:
a) Josef jogging from A to B;
i. speed = 2 m/s
ii. velocity = 2m/s
a) a) Josef jogging from A to C;
speed = 1.9 m/s
ii. velocity = 2.2 m/s
Step-by-step explanation:
One major difference between speed and velocity is that speed is a scalar quantity, while velocity is a vector quantity.
a) Josef jogging from A to B;
distance = 300 m
time = 2.5 seconds = 150 seconds
i. his average speed = 
= 
= 2 m/s
ii. his average velocity = 
= 
= 2 m/s
b) Josef jogging from A to C,
distance = 300 + 100 = 400 m
time = 2.5 + 1 = 3.5 minutes
= 210 seconds
i. his average speed = 
= 
= 1.9 m/s
ii. his average velocity = 
= 4 m/s
= 1.9 m/s
his average velocity = 
= 2.2 m/s
Answer:
7/10 hours
Step-by-step explanation:
her first assignment took 1/2 hour
her second assignment took 1/5 hour
so in total she took 1/2 + 1/5
we need to find a common denominator
the lcm(2,5)=10
so multiply 1/2 by 5/5 to obtain 5/10
multiply 1/5 by 2/2 to obtain 2/10
5/10 + 2/10 = 7/10