What is the domain of the function f(x) = x2 + 3x + 5? a. all whole numbers b. all positive real numbers c. all integers d. all real numbers

The domain for this function is all real numbers (D).

The reason for this is that domain is equal to the numbers that you can put in for x. The only usual restrictions on this are 0 as a denominator and a negative under a square root symbol. Since we do not have fractions or square roots in this equation, the domain is all real numbers.

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

i used to know how to do this in 7th but i forget easily

step-by-step explanation: