Acontainer ship is overtaking an oil tanker on the way out of harwich

harbor, and the first mate notices that if he starts walking from the front of the container ship when the two ships start overlapping, he reaches the back as the two ship separate. he walks at 3 km/hour.

if the container ship is 100 m long, and travelling at 12 km/hour, how long is the oil tanker?

Add the fractions and simplify 1/2+ 1/3

Ineed to know the answer to this algebra question.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.