Check the picture below
for the DB length, make sure your calculator is in Degree mode, since the angles are in degrees.
At 4 seconds because 4 is the maximum point in the parabola
Price increase is $ 22-20 =$2 so the percent increase is 2/20 x 100= 10%
Answer:
See below
Step-by-step explanation:
Here is how to start....you didn't include the equations in question, so I do not know what the answer may be
solve for x
y-10 = 5 x^2 divide thru by 5
(y-10)/5 = x^2 'sqrt' both sides
± sqrt( (y-10) / 5 = x change x's and y's
± sqrt ((x-10)/5) = y