Answer:
After 20 months
Step-by-step explanation:
This is a compound growth problem which has the formula:
Where
F is future value
P is present amount
r is the rate of growth
t is the time (in months)
Future amount is $65, what he needs at-least
P is the initial amount, that is $10
r is the rate of growth, which is 10% or 10/100 = 0.1
t is time in months, what we need to find
Substituting and solving we get:
<u>He would need 19.64 months to save up at-least 65. So, that means, he would need 20 months</u>
The answer is the first one so A
Answer:
53.3324
Step-by-step explanation:
given that a thermometer is removed from a room where the temperature is 70° F and is taken outside, where the air temperature is 40° F.
By Newton law of cooling we have
T(t) =
where T (t) is temperature at time t,T =surrounding temperature = 40, T0 =70 = initial temperature
After half minute thermometer reads 60° F. Using this we can find k
So equation is
When t=1,
we get
The value of the x is 3.22 if the eˣ = 25 after taking the log both side and lne is 1.
<h3>What is a logarithm? </h3>
It is another way to represent the power of numbers, and we say that 'b' is the logarithm of 'c' with base 'a' if and only if 'a' to the power 'b' equals 'c'.
We have:
Taking ln both side:
xlne = 3.218
x = 3.218 (lne = 1)
or
x = 3.22
Thus, the value of the x is 3.22 if the eˣ = 25 after taking the log both side and lne is 1.
Learn more about the Logarithm here:
brainly.com/question/163125
#SPJ1
Answer:
its a movie
Step-by-step explanation: