The distance D, in miles, to the horizon from an observer's point of view over water or "flat" earth is given below, where H is the height of the point of view, in feet. If a person whose eyes are 3 ft above ground level is standing at the top of a hill 69 ft above "flat" earth, approximately how far to the horizon will she be able to see?

10.39 miles

Step-by-step explanation:

The distance to the horizon depends almost completely on the height above sea-level that the observer is looking from. 

Given that  person eyes are 3 ft above ground level and standing at the top of a hill 69 ft above "flat" earth.

Local elevation = 69 ft

Height H of the eye = 69 + 3 = 72 ft

Distance of the horizon in miles = sqrt root (1.5 × height of the eyes in ft)

Distance = sqrt root (1.5 × 72)

Distance = 10.39 miles.

answer: city needs 2.4 inches of rainfall more to match the record of 40 inches.

step-by-step explanation:

since we have given that

total annual rainfall a city record = 40 inches

this year, total rainfall recorded = 37.6 inches

number of inches of rainfall   is needed to match the record of 40 inches is given by

hence, city needs 2.4 inches of rainfall more to match the record of 40 inches.