Which expression represents the algebraic phrase “negative 3.9 less than one third of a number”?

Which expression converts 45 degree to radians

Find the volume of the solid whose base is the region bounded by f(x), g(x) and the x-axis on the interval [0, 1], and whose cross-sections perpendicular to the y-axis are squares. your work must show the integral, but you may use your calculator to evaluate it. give 3 decimal places for your answe

What is the sum of the first 8 terms of the geometric series