Part c (1 points) What is 925? There are many answers possible (after all, you can always add or subtract 27r from the argument of a cos function without changing its value). Give the answer (with the correct sign) that is closest to O. The answer is an integer. Please enter a numerical answer below. Accepted formats are numbers or \"e\" based scientic notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter ans er here Your 314 CHECK SaVEd ANSWER 3 of 5 checks used Question 7 This question contains multiple parts. Make sure to read all the instructions and answer each part. Answer the following problems involving scaling relationships: Part a (1 points) The area of a circle scales with the square of its radius: A N r2. If the radius of a circle is quadrupled (multiplied by 4), by what factor will the area change? Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here CHECK NO answer ANSWER submitted 0 of 5 checks used SHOW HINT Part c (1 points) If I = log10 () then what is log10 (2ac)? Select the correct answer CHECK Saved ANSWER 1 of 3 checks used OI +0.3 0.31 Your Answer O 21 0 12 OI -0.3 O VIPart c (1 points) For the sinusoidal function f(t) : 1.50 cos(0.107t + 0.472), what is the derivative att : 2? f'(2) : Please enter a numerical answer below. Accepted formats are numbers or \"e" based scientic notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here 0.002 CHECK No answer ANSWER submitted 2 of 5 checks used Part d (1 points) For the sinusoidal function f(t) : 1.50 cos(0.107t + 0.472), what is the second derivative at t : 4? f"(4) : Please enter a numerical answer below. Accepted formats are numbers or \"e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here