ceciliaxo
12.02.2021 •
Mathematics
The bottom of a river makes a V-shape that can be modeled with the absolute-value function
d(h) = 1/4 |h − 184| − 46,
where d is the depth of the river bottom (in feet) and h is the horizontal distance to the left-hand shore (in feet).
A ship risks running aground if the bottom of its keel (its lowest point under the water) reaches down to the river bottom. Suppose you are the harbormaster and you want to place buoys where the river bottom is 35 feet below the surface. How far from the left-hand shore should you place the buoys?
Complete the absolute-value equation. Solve the equation and determine which, if any, of the solutions are appropriate.
1/4 |h − 184| − 46 = ? question mark is because it has to be answered and i do not know
The solutions are h= ? and h=?
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Ответ:
In 2014 , 2277 was 110% of 2013.
Number in 2013 = 90% of the year before (2012)
Let the number in 2013 be x. From the first statement,
2277 = 110% of x
2277 = (110/100)x
2277 = 1.10x
x = 2277/1.1 = 2070
Number in 2013 is 2070
Number in 2013 = 90% Number in 2012
2070 = (90/100) * Number in 2012
2070 = 0.90 * Number in 2012
2070 / 0.90 = Number in 2012
2300 = Number in 2012
Number in 2012 = 2300