Amalia. Phones rule is only true with numbers between 1 and 1,000.
A = 10
Step by step
3+7=10
10+(-7)=3
Answer:
16 years approx
Step-by-step explanation:
Given data
P=$3000
r= 6%
A= $7700
t= ??
The compound interest formula is
A= P(1+r)^t
Calculate time, solve for t
t = ln(A/P) / r
substitute
t= ln(7700/3000)/0.06
t= ln(2.566)/0.06
t= 0.942/0.06
t= 15.7
The time is 16 years approx
If b=-2 then -2x+-2 =-12 making x equal 5 ,5 times -2 equals -10 plus negative 2 equals -12
