Answer:
y=4/5x1
Step-by-step explanation:
760=75x+160
subtract 160
600=75x
divide 75 from 600
x=8 days
Answer:
the submarine is 92.994 feet ≈ 93 feet deep from the surface of the water
Step-by-step explanation:
We can think in a triangle where the hypotenuse is the detection distance and the angle with the horizontal surface of water is the depression angle, then the underwater distance is the vertical side of the triangle.
If we denote Ф as the angle of depression ,d as the detection distance and x as the unknown depth of the submarine, using trigonometry:
x = d* sin Ф
thus
x= d * sin Ф = 238 feet * sin 23° = 92.994 feet ≈ 93 feet
Answer:
It will take 6.2 years for the value of the account to be $12,000
Step-by-step explanation:
P x (1 + rn)
Where P = Principal
r rate of interest
n = number of time interest is calculated in a year
$10,000 x (1.03)N = $12,000
(1.03)N = $12000 / $10000
(1.03)N = 1.2
Taking natural log,
N x ln 1.03 = ln 1.2
N x 0.0296 = 0.1823
N = 6.2 years
