Which is the equation of a parabola with a directrix at y = −3 and a focus at (−2, 3). y = one twelfth(x − 2)2 y = one twelfth(x + 2)2 y = −one twelfth(x + 2)2 y = −one twelfth(x − 2)2

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Acompany manufactures large valves, packed in boxes. a shipment consists of 1500 valves packed in 75 boxes. each box has the outer dimensions 1.2 x 0.8 x 1.6 m and the inner dimensions 1.19 x 0.79 x 1.59 m. the boxes are loaded on a vehicle (truck + trailer). the available capacity in the vehicle combination is 140 m3. each valve has a volume of 0.06 m3. - calculate the load factor on the box level (%). - calculate the load factor on the vehicle level (%). - calculate the overall load factor (%).

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read