The equation t(x)=x+0.029x models the total cost of an item, in dollars, where x is the cost before sales tax. what is the total cost of a $20 item?

The circumference of a circle is 5 pi cm. what is the area of the circle?

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100

Me! 50 points! why does when we come home, our door is unlocked and there is grease on the door knob, me solve this , and i don't know what category this goes under