What is 2.1 times 10^4 in standard form

What number is not part of the domain of the function: g (x) = x+2/x-1? how can you tell?

Solve equation for d. .2 (d-6) =.3+5-3+.1d

Sam has 3 1/3 books left to read for school. Sam read 2 7/8 books on Tuesday. Sam reads 2 7/12 times faster on weekday. How many more books does Sam need to read?

Simplify the expression. Write the answer using scientific notation. 0.6 (6.5 x 10^-5)

Out of 30 students surveyed 17 have a dog based on the results predict how many of the 300 students in the school have a dog?

Two lines parallel to the same plane are parallel to each other ... A] always. B] sometimes. C] never

Find the solutions of the equation that are in the interval [0, 2π). (enter your answers as a comma-separated list. if there is no solution, enter no solution.) cot2 θ + cot θ = 0

If the area of a circle measures 9/4 π cm2, what is the circumference of the circle in terms of π?

What is the 10th term in the geometric sequence: 32, 16, 8, 4 ... ?

Which of these polygons is not formed by the cross-section created when a plane intersects a cube? Select all that are possible. square circle pentagon octagon triangle rectangle