I believe the first question is 4 feet / 1 second and the second answer is 16 oz / 1 lb
Equation pi X r^2 first one = 158.37
second one 50.27
Factor out cosx: cosx(sinx-2)=0
cosx=0 or sinx-2=0
cosx=0 or sinx=2
the largest value of sinx is 1, sinx will never be 2, so cosx=0, x=π/2 or 3π/2 are the two answers.
Your answer would be 125.4 cause the number is too small to be 130 so yeah hope this helps
