A dump truck weighs 11.25 tons when empty . A conveyor belt puts sand into the truck at a constant rate of 1/4 ton per minute until it is full. Let *T* represent elapsed time in minutes and w represent weigh of the truck after *t* minutes . Write an equation for w in terms of t .

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.