Find the rate of the following: A. 5 is what percent of 25?
B. 3 is what percent of 12?
C. 1 is what percent of 10?
D. 85 is what percent of 340
E. 7 is what percent of 20?

If you answer right ill give brainliest, : )

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?

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000