The surface area of a triangular pyramid is 80 m2. if the pyramid is enlarged by a scale factor of 2, what is the surface area of the scaled image?

With these: 18/36 = 1/? missing number change 1 5/8 to improper fraction. change 19/5 to a mixed number.

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?

Use the distributive law to multiply. 3(4x + 5y + 6)