Answer:(a)
Step-by-step explanation:
Given
Principal amount 
Rate of interest 
Time 
Simple interest in 5 years



So total amount after five years
The value could be rewritten as 2(x+4)
Answer:
10.8 meters
Step-by-step explanation:
This situation forms a right triangle, where the length of the kite string is the hypotenuse, the distance from where it is held is the long leg, and the height is the short leg.
Use the pythagorean theorem to solve for c, the length of the kite string.
a² + b² = c²
6² + 9² = c²
36 + 81 = c²
117 = c²
10.8 = c
So, the length of the kite string is 10.8 meters
Answer:
AC = 4DB
Step-by-step explanation:
see attachment
Given that B is the midpoint of AC, this means that AB≅BC.
Also, D is the midpoint of AB, therefore AD≅DB.
This shows that AD is 1/4 of the length of AC, since it is 1/2 of the length (1/2 x 1/2 = 1/4). DB is the same length, since it is congruent to AD.
Thus, AC = 4DB.
Answer:
100 mL
Step-by-step explanation:
If x is the volume of 35% solution, then:
0.35x + 0.20(50) = 0.30(x + 50)
0.35x + 10 = 0.30x + 15
0.05x = 5
x = 100
You need 100 mL of 35% solution.