Driving at a constant speed, Reggie travels 300 kilometers in 1 hour.
2 answers:
Given parameters:
Distance covered by Reggie = 300km
Time taken = 1hour
Unknown parameter:
Speed of Reggie in km per hour = ?
Speed is a physical quantity which is classified as a scalar parameter. As a scalar, speed has magnitude but no directional attribute.
Also, speed is the rate of change of distance with time.
Mathematically;
Speed =
Now, to solve for speed, input the parameters given.
Speed = = 300km/hr
Therefore, Reggie drives at a speed of 300km/hr
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The function of the water balloon is an illustration of a quadratic function.
The balloon will splat on the ground after 2.5 seconds
The function is given as:
When the balloon splats on the ground, the value of h(t) is 0.
So, we have:
Expand the expression
Factorize the above expression
Factor out 2t - 5 in the 2t - 5
Split the equation into 2
Rewrite as:
Solve for t
The value of t cannot be less than 0 i.e. negative.
So, we have
Divide 5 by 2
Hence, the balloon will splat on the ground after 2.5 seconds
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