A7.5 kg block is placed on a table. if it's bottom surface area is 0.6m2, how much pressure does the block exert on the tabletop? a) 367.5 pa b) 122.5 pa c) 226.5 pa d) 73.5 pa

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).

The radius of a sphere is increasing at a rate of 9 cm/ sec. find the radius of the sphere when the volume and the radius of the sphere are increasing at the same numerical rate.