Ricardo and john start swimming from the same location. ricardo starts 15 seconds before john and swims at a rate of 3 feet per second. john swims at a rate of 4 feet per second in the same direction as ricardo. which equation could you solve to find how long it would take john to catch up with ricardo?
a. 4t+3=3t
b. 4t+60=3t
c. 3t+3=4t
d. 3t+45=4t

Miguel bought a movie ticket that cost $5. he also bought popcorn and a bottle of water. how much did miguel spend altogether?

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

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.