Answer:
Step-by-step explanation:
The Law of Sines is given by 
and works for any triangle.
Therefore, we have the proportion:
1) The amount M 1 IS $20 increases by 10% = 10 % *(20) + 20 = 22
2) The amount M1 decreases by 10% = 22- (10%*22) = $ 19,8 IS THE AMOUNT that i earn each week
The formula for calculating compound interest with yearly contributions is:
Balance = X*(1 + Y)^n + Z((1 + Y)^(n + 1) - (1 + Y)/Y)
where the balance is the money earned after n years invested
Y is the interest rate as a fraction
Z is the yearly contribution
X is the starting investment
Therefore the calculation for this example is:
Balance = 1200*(1 + 0.05)^48 + 1200((1.05)^49 - (1.05)/05)
= $249,393.5
Answer:
-10,10
Step-by-step explanation:
The given quadratic equation is
The discriminant of this equation is given by;
where a=k, b=20, c=k
For rational solutions, the discriminant must be zero.
Simplify to get:
This implies that:
Take square root to get:
