Which formula can be used to describe the sequence?

-3, 3/5, -3/25, 3/125, -3/625

a. f(x) = -3(1/5)^x-1
b. f(x) = -3(1/5)^x-1
c. f(x) = -1/5(3)^x-1
d. f(x) = -1/5(-3)^x-1

What is the ratio for the surface areas of rectangle prisims shown below given that they are similar and that the ratio of their edge lengths is 7: 3

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?

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?