if the cost C of medical insurance is $15 per person per week, then the weekly insurance cost for n people is

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

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