The correct answers are 1. A, 2. C, 3. D, 4. C, 5. A
Answer:
Step-by-step explanation:
The function
gives the mass of the car as a function of the number of passengers in it.
And the function
gives the potential energy of the car as a function of the car's mass.
Now if the height of the ramp is 30 meters, we have
And to find the potential energy as a function of the number of passengers, we just substitute 
into 
to get:
which gives the potential energy as a function of the number of passengers.
Answer:
You must show us the statements that are given. This question can not be answered without that information. Have a nice day!!! :-)
Step-by-step explanation:
Answer:
a
Step-by-step explanation:
the line with equation x = 4 is the equation of a vertical line parallel to the y- axis. Not a horizontal line
Answer:
1.5 km/hour
Step-by-step explanation:
d is the David's speed in still water
c is the speed of the current
Going with the current, he travels d+c km per hour.
Going against the current, he travels d-c km per hour.
d+c = (20 km)/(2.5 hours) = 8 km/hour
d-c = (20 km)/(4 hours) = 5 km/hour
Add the equations to eliminate the c terms
d+c = 8
d-c = 5
----------
2d = 13
d = 6.5 km/hour
c = 8-d = 1.5 km/hour
