Mark buys a used car for $12,000. The value of the car depreciates 10% per year from the time he bought the car. The value of Mark's car, V(t), can be represented by which of the following functions?
V(t) = –0.10t + 12,000
V(t) = 12,000(0.90)t
V(t) = –0.90t + 12,000
V(t) = 12,000(0.10)t

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

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?