Answer:
Both functions have one x-intercept each.
Step-by-step explanation:
The first function is

This is a parabola with vertices at the origin and has one x-intercept at t=0.
The transformed function is

The function g(t) is obtained by shifting the graph of f(t) to the left by 3 units.
This graph also has one x-intercept at x=-3.
Therefore both functions has the same number of x-intercepts
Answer:
b
Step-by-step explanation:
3 pipes take 12 hours
⇒ In 1 hour, the 3 pipes can fill 1/12 of the pool
2 of the pipes take 18 hours
⇒ in 1 hour, the 2 pipes can fill 1/18 of the pool
In 1 hour, the third pipe alone can fill :

Time needed :

----------------------------------------------------------------------------------------
Answer: It will take 36 hours for the third pipe to fill the pool.----------------------------------------------------------------------------------------