Arock 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.

•757 mil years
•37 mil years
•12 mil years
•1.2 nil years

ratio is 2 : 9

the answer is three

13.5 : 3

14

step-by-step explanation:

14

convert the answer to millimeters there are 25.4 millimeters in an inch and 12 inches in a foot so just divide the 5280 feet into a fraction of the numbers till you get to the simplest form you need so (5280 x 12=63360 inches) (63360 x 25.4=1609344 millimeters) (5280/12=440 feet) its as simple as that just break it down to it's simplest form.

answer: 89 x 5

step-by-step explanation: