The price of silver went from $26.40 a troy ounce down to $17.16 a troy ounce during the past 6 months. this represents a decrease in price of what percent?

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

Simplify the algebraic expression 8y-2(y+4)

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.