A rock outcrop was found to have 89.00% of its parent U-238 isotope remaining. Approximate the age of the outcrop. The half-life of U-238 is 4.5 billion years old. a. 12 million years
b. 757 million years
c. 37 million years
d. 1.2 billion years

The sales tax rate is 7.25%. how much tax in dollars is added on an item that costs $56.00? a. $4.06 b. $7.25 c. $14.50 d. $60.06

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

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 (%).