Let ¯¯¯ x be the mean life expectancy in a sample of 100 non‑Hispanic black females. Determine the interval centered at the population mean μ such that 95 % of sample means ¯¯¯ x will fall in the interval. Give your answers precise to one decimal.

Big boi and travis scott are performing at the super bowl. travis scott is 62 years younger than twice big boi’s age. the sum of their ages is 70 years old. use b to represent big boi’s age. write and solve an equation.

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 (%).

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28