Answer:
D
Step-by-step explanation:
loudness depends on the amplitude or height of the sound waves
All you have to do is add 399 to 10 and then multiply by ten. Then you get 199 and multiply by .08 and multiply that by ten. Then you subtract.
Answer:
14
Step-by-step explanation:
f(x)=-1/3x+13
f(-3)=-1/3(-3)+13
f(-3)=3/3+13
f(-3)=1+13
f(-3)=14
Here is a graph of the problem.
You can tell because the points are (1,5),(2,10),(3,15), ect. For every Car he washes we times by 5. Example: if he's washed 10 cars, he gets $50 because 10*5=50. We model this one the graph. When the X increases by 1 the Y increases by 5.
3.5 ounces hope this helps