Find the indicated area under the curve of the standard normal distribution; then covert it to a percentage and fill in the blank. About ___% of the area is between z=-2 and z=2 (or within 2 standard deviations of the mean)

Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base