The surface area of a rectangular-prism-shaped skyscraper is 1,097,000 ft2. What is the surface area of a similar model that has a scale factor of 1/300? Round your answer to the nearest tenth.

What is the standard form of -5x^2+2x^4-11+x^3+3x

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Find the midpoint m of z1=(8+5i) and z2=(12+3i)