Answer: a) An = An-1 + An-2
b) 55ways
Step-by-step explanation:
a) a nickel is 5 cents and a dime is 10cent so a multiple of 5 cents is the possible way to pay the tolls in both choices.
Let An represents the number of possible ways the driver can pay a toll of 5n cents, so that
An = 5n cents
Case 1: Using a nickel for payment which is 5 cents, the number of ways given as;
An-1 = 5( n-1)
Case 2: using a dime which is two 5 cents, the number of ways is given as;
An-2 = 5(n-2)
Summing up the number of ways, we have
An = An-1 + An-2
From the relation,
If n= 0, Ao= 1
n =1, A1= 1
b) 45 cents paid in multiples of 5cents will give us 9 ways(A9)
From the relation, we have that
Ao = 1
A1 = 1
An =An-1 + An-2
Ao = 1
A1 = 1
A2 = A1+Ao = 1+1= 2
A3 = A2 + A1 = 3
A4 = A3+A2=5
A5=A4+A3=8
A6=A5+A4=13
A7 =A6+A5 = 21
A8= A7+A6= 34
A9= A8+A7= 55
So there are 55ways to pay 45cents.
In linear models there is a constant additve rate of change. For example, in the equation y = mx + b, m is the constanta additivie rate of change.
In exponential models there is a constant multiplicative rate of change.
The function of the graph seems of the exponential type, so we can expect a constant multiplicative exponential rate.
We can test that using several pair of points.
The multiplicative rate of change is calcualted in this way:
[f(a) / f(b) ] / (a - b)
Use the points given in the graph: (2, 12.5) , (1, 5) , (0, 2) , (-1, 0.8)
[12.5 / 5] / (2 - 1) = 2.5
[5 / 2] / (1 - 0) = 2.5
[2 / 0.8] / (0 - (-1) ) = 2.5
Then, do doubt, the answer is 2.5
Answer:
4
Step-by-step explanation:
when you multiply a number by itself, therefore you have to multiple 2twice
The length of the radius of circle o is 18 cm.
<h2>
</h2><h2>
Given that</h2>
Circle o has a circumference of 36π cm.
<h3>
We have to determine</h3>
What is the length of the radius, r?
<h3>According to the question</h3>
Circle o has a circumference of 36π cm.
The length of the radius of the circle is determined by the following formula;
![\rm Circumference = 2\pi r](https://tex.z-dn.net/?f=%5Crm%20Circumference%20%3D%202%5Cpi%20r)
Substitute all the values in the formula;
![\rm Circumference = 2\pi r\\ \\ 36\pi =2\pi r\\ \\ r = \dfrac{36\pi }{2\pi }\\ \\ r = 18 \ cm](https://tex.z-dn.net/?f=%5Crm%20Circumference%20%3D%202%5Cpi%20r%5C%5C%0A%5C%5C%0A36%5Cpi%20%3D2%5Cpi%20r%5C%5C%0A%5C%5C%0Ar%20%3D%20%5Cdfrac%7B36%5Cpi%20%7D%7B2%5Cpi%20%7D%5C%5C%0A%5C%5C%0Ar%20%3D%2018%20%5C%20cm)
Hence, the length of the radius of circle o is 18 cm.
To know more about Circumference click the link given below.
brainly.com/question/4268218
374 = 33
272 = x
374/33 = 272/x
x=(33*272)/374=24 minutes