Aril and Dita are wealthy Norwegian business owners who each began making monthly donations to international disaster relief at the same time. Aril donated 150 kr the first month, and the cumulative number of Norwegian kroners she has donated increases by a factor of 2.5 each month. Dita donated 300 kr the first month, and the cumulative number of Norwegian kroners she has donated increases by 400 kro each month. What is the first month in which month will Aril's cumulative donation first exceed Dita's cumulative donation?

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)

how much is coupon

step-by-step explanation:

x:       y:  

-1         4

0         4

1         6

2         18

3         20