Determine the coordinates of the vertex and horizontal intercepts of the parabola. (if an answer does not exist, enter dne.)
f(x) = −7(x + 12)2 + 14
i cant figure out the horizontal intercepts.

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

Me find the value of x each figure.