The surface area of a cone with radius r units and slant height s units is shown below:

surface area = 3.14(rs + r2)

part a: if r = 6 units and s = 4 units, write an expression that can be used to calculate the surface area of the cone.

part b: what is the surface area of the cone?

i don't understand this good, so any would be great!
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Which function has the same domain as y=2x

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.