A company sells shirts for $10 each. Its revenue function is r(x) = 10x. Its costs are $3 per shirt plus $9,000 of fixed costs. Its cost function is c(x) =
3x + 9000. Profit equals the difference between revenue and cost.
Write the profit function, p(x), for this company.

If n stands for number sold and c stands for cost per item, in which column would you use the formula: ? a. column d c. column f b. column e d. column g

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?

Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars