Answer:
The velocity of the ball relative the racquet is 15 m/s.
Step-by-step explanation:
Given;
velocity of the tennis ball, = 30 m/s
Velocity of the racquet swung in opposite direction, = 15 m/s
The velocity of the ball relative the racquet () is calculated as;
Therefore, the velocity of the ball relative the racquet is 15 m/s.
Using the equation A=P(1+(r/n))^nt.
n=monthly, so it's 12.
t=19 years
r=6.9% as a decimal is .069
P=47,000
.069/12=.00575
.00575+1=1.00575
nt=12*19=228
1.00575^228=3.695
3.695*47000=$173,711
Answer: $173,711
See the picture below. I just used Desmos.
I do not know what you want, but the equation is 3x - 9