PLEASE HELP, I CANT FIGURE IT OUT AND IT IS DUE TOMORROW MORNING Find area of the isosceles triangle formed by the vertex and the x-intercepts of parabola y=−x^2−4x+21.

Name the most appropriate metric unit for each measurement like a length of an carrot

Calculate the effective quarterly compound interest rate equivalent to a 1% of monthly compound interest rate.

Anew obstacle course is home to several new types of challenging obstacles. one such obstacle is traversing a 15-stair staircase. to make it more challenging, the stairs are not uniformly spaced. rather, the vertical space between consecutive stairs for the first 10 stairs is 113 feet and the vertical space for the last 5 stairs is 134 feet. what is the total vertical distance traveled ascending and descending the entire 15-stair staircase?