Please help Spencer cycled a total of 12 kilometers by making 3 trips to work. After 5 trips to
work, how many kilometers will Spencer have cycled in total? Assume the relationship
is directly proportional.

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?

The coverage of a base station of a telecommunication company forms a disk with a radius of (kilometers). let be the distance of a cellphone from a base station. assume that the location of cellphones in use are randomly uniformly distributed within the disk. calculate the mean and variance for the random variable.