Answer:
9.694 years
Step-by-step explanation:
Let the investment is $P.
So, we are asked to determine the time it will grow to triple with the compound interest rate of 12%.
Let the time is y years.
So, from the formula of compound interest we can write
⇒ 
⇒ 
Now, taking log both sides we get,
y log 1.12 = log 3 {Since, 
}
⇒ 0.04922y = 0.477712
⇒ y = 9.694 years (Answer)
15 round by the nearest 10 is 20.
Answer:
y=
Step-by-step explanation:
multiply both sides
8y+5=6
move the constant to the right
8y=6-5
calculate
8y=1
divide both sides
y= or y=0.125
Answer:Explained
Step-by-step explanation:
Given
One shirt cost $24.97 and other costs $13.75
Using mental math, Payton rounds $24.97 to $25
and add it to $13.75 to get $38.75
in order to get correct total of two shirts Payton needs to subtract $0.03 from the final amount as she round 0.97 to 1 initially
so final amount will be 38.75-0.03=$38.72
