Natalie buys 3 harmonicas. Each harmonica costs $2.85. How much does Natalie spend?

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle

Cherie works in retail and her weekly salary includes commission for the amount she sells. the equation s=400+0.15c models the relation between her weekly salary, s, in dollars and the amount of her sales, c, in dollars. interpret the slope of the equation.