Your friend used the proportion 15/100 = 45/? to find 15% of 45 and says that the answer is 300. Complete the explanation as to why your friend is incorrect and find the correct answer.

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.

I’m really confused and need your assist me with this question i’ve never been taught

The equation represents the function f, and the graph represents the function g. f(x)=3(5/2)^x determine the relationship between the growth factors of f and g. a. the growth factor of g is twice the growth factor of f. b. the growth factor of f is twice the growth factor of g. c. the growth factor of f is 2.5 times the growth factor of g. d. the growth factor of f is the same as the growth factor of g.