The distance between two cities is 400 miles. The function represents the average speed a person must travel over x hours to cover the distance. Which best compares the mathematical domain and range with the reasonable domain and range?mathematical: {x ∈ R} {y ∈ R}reasonable: x > 0, y ≥ 0mathematical: {x ∈ R ∣ x ≠ 0} {y ∈ R ∣ y ≠ 0}reasonable: x > 0, y > 0mathematical: {x ∈ R} {y ∈ R}reasonable: x ≥ 0, y ≥ 0mathematical: {x ∈ R ∣ x ≠ 0} {y ∈ R ∣ y ≠ 0}reasonable: x ≥ 0, y ≥ 0

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm

the circumference of a circle is, 10.676 cm.

step-by-step explanation:

the formula for circumference of a circle is given by:

where

c is the circumference of a circle and

d is the diameter of a circle.

given: diameter(d) = 3.4 cm and use

substitute these values in [1] we get;

cm

therefore, the circumference of a circle is, 10.676 cm