Suppose a white dwarf star has a diameter of approximately 1.8083 to the power of 4 km. Use the formula 4n to the power of 2 to find the approximate surface area of the star.

The surface area of the star is 3.2700 x square kilometres.

EXPLANATIONS:

Diameter of the star = 1.8083 x Km.

Surface area of the star = 4

Where n is the radius of the star.

So that;

n =

   = 0.90415 x

n =  0.90415 x Km

Thus,

Surface area = 4 x

                     = 326994889

Surface area = 3.2700 x

Therefore, the surface area of the star is 3.2700 x square kilometres.

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98