<span>Let </span>
<span>X= the altitude of the lighthouse above sea
level= 80 ft</span>
A = the angle of depression
Y= the distance of the boat from the lighthouse= 400 ft
tan A=X/Y------------------ >
80/400=0.2
arctan (0.2)=11.31 degree
The answer is the angle of depression is 11 degree
No. 49 is not a multiple of 14. The only number that can do the job is 3.5 .
Please clearer picture thank u
Let the 2 integers be
x and
y.
Their product is 72, so we write:
xy=72. (I)
One of them, say
y, is 2 less than 5 times the other. We can write this as the equation:
y=5x-2. (II)
To find one of numbers, say x, we can substitute y with 5x-2, in the first equation:
xy=72,

expanding the left hand side expression we get:

.
Answer: C