Aship of unknown heightis sighted from a lighthouse. from the top of the lighthouse, the angle of depression to the top of the mast and the base of the ship equals 30oand 45orespectively. if the shipis 50m away from the base of the lighthouse then what is the height of the ship(in meters)?

Step-by-step explanation:

From the given information, consider DB=x be the height of the ship, BC= 50 m, then DE=50 m.

Now, From ΔABC,

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Also, from ΔADE, DE=50 m, we have

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Now, AC=AE+EC

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⇒

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Also, we know that EC=BD, therefore BD=21.14 meters.

Thus,the height of the ship= 21.14 meters.

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.