WATER DEPTH An echo sounder is a device used to determine the depth of water by measuring the time it takes a sound produced just below the water surface to
return, or echo, from the bottom of the body of water. The accuracy of an echo
sounder is the positive difference between the depth of water reading on the echo
sounder r and the actual depth of water w. Write two absolute value expressions
equivalent to the accuracy of an echo sounder.

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

a triangular prism is a 3 dimensional shape composed of triangles and rectangles. it is made from two triangular bases and three rectangular sides.  

2

step-by-step explanation:

- click here to get an answer to your question ✍ 75 i will mark one of the angles formed by two

step-by-step explanation: