You are standing on the edge of a swimming pool and looking directly across at the opposite side. you notice that the bottom edge of the opposite side of the pool appears to be at an angle of 26.9° below the horizontal. however, when you sit on the pool edge, the bottom edge of the opposite side of the pool appears to be at an angle of only 14.1° below the horizontal. use these observations to determine the width and depth of the pool. hint: you will need to estimate the height of your eyes above the surface of the water when standing and sitting. (assume 1.7 m when standing and 0.7 m when sitting.)

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