Hanna invested 5000 in an investment. The exponential function y = 5000(1.06)^x is the amount Hanna earns from this invested over time. What is the rate (r) of this function?

Can someone me with this problem i don't understand i need

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.