PLZ HELP, ANSWER WHAT IS IN THE PICTURE

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%

Ok a point t on a segment with endpoints d(1, 4) and f(7, 1) partitions the segment in a 2: 1 ratio. find t. you must show all work to receive credit.