The difference of the square of a number and three times the sum of the number and 7 is more than the product of that number and 15.

select the inequality that can be used to determine the unknown number.

a.
x2 - 3x - 21 > 15x
b.
x2 - 3x + 21 > 15 + x
c.
x2 - 3x + 7 ≥ 15x
d.
x2 + 3x ≥ 15 + x

A

Step-by-step explanation:

The question stated that the difference of the square of a number and three times the sum of the number and 7 (x^2-3 (x+7))is more than the product of that number and 15 (15x)

So x^2- 3(x+7)>15(x)= x^2 -3x +21>15x

then, the surface area of the sphere shown in the image is: 256π sq. units!

step-by-step explanation:

the lateral surface area of a sphere is 2πrh where h=2r.

then:

surface area = 4πr^2.

in this case, r=8 units ⇒ surface area = 4π(8 units)^2. = 256π sq. units!

then, the surface area of the sphere shown in the image is: 256π sq. units!

rounding to the nearest thousandth would be 452,000