Use the second derivative test to find the local maximum and minimum values and saddle points of the function f(x, y) = 4x^3−2x^2 y +y^2 + 8y.

Having a hard time understanding this question (see attachment).

Darragh has a golden eagle coin in his collection with a mass of 13.551\,\text{g}13.551g. an uncirculated golden eagle coin has a mass of 13.714\,\text{g}13.714g.

The measures of two supplementary angles are (2x + 10)° and (8x + 10)°. what is the measure of the larger angle? a. 16° b. 44° c. 14° d. 138°