At 10:00 a. m., Han and Tyler both started running toward each other from opposite ends of a 10-mile path along a river. Han runs at a pace of 12 minutes per mile. Tyler
runs at a pace of 15 minutes per mile.
1. How far does Han run after a half hour? After an hour?
2. Do Han and Tyler meet on the path within 1 hour? Explain or show your reasoning.

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

a

step-by-step explanation:

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e^-kt = n/n0 = 0.79  

-kt = ln 0.79  

t = - ln 0.79/0.0001  

= 2357 years

step-by-step explanation: