Nikki purchases a digital camera for her family to use on their vaction. The model she purchased was on sale for $129. The sales tax rate fir her city is 7.5$. What is the total cost in dollars and cents, including tax, for the digital camera.

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?

Which are factor pairs of 350? choose all answers that are correct. a) 30 and 12 b) 35 and 10 c) 70 and 5 d) 2 and 125

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.