See attached file for the drawing and illustration of the given problem.
I have assigned "X" to be the length of the ramp.
We can use and apply SOH CAH TOA to find the value of x. The solution is shown below:
sin4.5 ° = 3 / x
x = 3/sin4.5
x= 38.2°
The answer is the letter "D".
Answer:
7x + 15x= 21x
Step-by-step explanation:
7x + 15x
= (7 + 15)x
= 22x
You divide by 5/13. Remember when dividing fractions you multiply by the reciprocal. 5/13 cancels on the left side, leaving t.
So here you have -9/(5/13), but we can put -9 as -9/1, then instead of dividing by 5/13, multiply by 13/5: 117/5. This evens out, when divided, to t=23.4
Due to the doppler effect the correct rank of this effect is: B- toward the listener at 50 km/h then A- toward the listener at 30 km/h and then C- away from the listener at 20 km/h