Helen invested £6000 for 5 years in a savings account.
She got n% compound interest each year.
At the end of n years Helen had £6995.64 in
her savings account.
Work out the value of n.
You must show your working.

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Given the function f(x) = 3x + 1, evaluate f(a + 1). a. 3a + 1 b. a + 2 c. 3a + 4

Abank gives 6.5% interest per year. what is the growth factor b in this situation?