A radio tower is located 425 feet from a building. From a window in the building a person determines that the angle of the elevation to the top of the tower is 36 degrees and that the angle of the depression to the bottom of the tower is 21 degrees. How tall is the tower?

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

after 1 year: 221 deer

step-by-step explanation:

30% of 170 is 51. 170+51=221