What is the domain of the function f(x) = 2/5 sq x ?

d)  All real numbers greater than or equal to 0.

Step-by-step explanation:

The given function f(x)=2/5 √x

Inside the square root, we will not have the negative number.

If we have the negative number inside the square root, then it will be imaginary number.

Therefore, domain is the all the real numbers greater than or equal to 0.

Here 0 is possible because square root (0) = 0.

d) All real numbers greater than or equal to 0.

Thank you.

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.

7.3

step-by-step explanation: