Last year the depth of the river was 4.2 feet deep. This year it dropped 19%.

Find the depth of the river this year to cross it.

3.402

Step-by-step explanation:

If it dropped 19% that means it is only 0.81 of the depth last year. Multiplying 0.81 by 4.2 gives 3.402.

the domain of a function is the set of input values, x , for which a function is defined. the domain is shown in the left oval in the picture below. the function provides an output value, f(x) , for each member of the domain.