We depend on satellites for many of our communication needs. What evidence from the text supports this conclusion?

A. The military has spy satellites to help them peek in on other people around the world.

B. Satellites allow us to use the phone, Internet, television, and radio.

C. Earth’s gravitational pull on an object weakens the farther away it is from the planet’s surface.

D. Isaac Newton discovered gravity when an apple fell on his head.

HELP ME DUE NOW, ILL BRAINELIST RIGHT NOW PLEASE

the answer is to check all of them! they all apply well at least i think so!

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2