The answer is 53.85 x 1.54 = 77

Cot x = cos x / sin x

or Cot x = 1/ tan x

Given:

Cot x = 4

Tan x = 1/4

x = 14.03 degrees

**Answer:**

125in^2

**Step-by-step explanation:**

Surface area= Area of base+ 1/2ps

since it's a square the area of the base is 5 x 5 which equals 25

next we multiply the perimeter by s which is 10

it's a square so the perimeter is 5+5+5+5 = 25

so 25+1/2(250)

25+ 125

=125 in^2

Let's say the APR is 5%. That means you get 5% of your balance back every year. The $100 balance would get $5 back, the $500 balance would get $25 back, and the $1000 balance would get $50 back. Therefore, all of the balances would take the same amount of time to double, and it would take all of them 20 years.

$5*20 years=$100

$25*20 years=$500

$50*20 years=$1000