Which of these num. are prime:

1, 11, 21, 51?

What are the focus and directrix of the parabola with the equation y = 1/12x^2 focus: (3,0); directrix: y=-3 focus: (-3,0); directrix: y = 3 focus: (0,3); directrix: y=-3 focus: (0, - 3); directrix: y = 3

A space shuttle can travel 18000 miles per hour in orbit. at this rate how far cam it travel in 24 hours

The average US woman wears 515 chemicals on an average day from her makeup and toiletries. A random sample from California found that on average the California woman wears 325 chemicals per day with a standard deviation of 90.5.

Getting a sum of either 7 or 12 on a roll of two dice. Overlapping or non overlapping? Probability of combined events?

The area of a parallelogram is 420cm^2 and the height is 35cm. Find the corresponding base.

Find the volume of a sphere with a radius of 620,000 miles write you answer using a scientific notation

What is the excluded value of x for the expression (x-4) ^2 / (x-9) ^2

Factor the polynomial completely 4x^3-8x^2+3x-6

Angle 1 and angle 2 are supplementary angle 1 equals 124 degrees and go to equals 2x + 4 degrees what is the value of x

Which is an example of a short-term investment? O savings bond savings account retirement fund o checking account