What is suface area of a cone with 16in radius and 38in hight?

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?