Answer:
A rational number is a number such as -3/7 that can be expressed as the quotient or fraction a/b of two integers, a numerator q and a non-zero denominator b. Every integer is a rational number: for example, 10 = 10/1.
Part 1.
A. x=0 can be used for function that have x≤1, so f(x) =x²
B.You need substitute x by 0. x=0,
then
f(0) = 1) x² =0² =
0 x≤1 Part 2.
A. f(x) =x², Graph is attached.
B. f(x) =2x+1, Graph is attached.
C. The functions will change in the point x=1
For f(x) =x² , x ≤1 ; f(1) = 1. The point (1,1) is included, the dot should be filled (closed).
For the function f(x)=2x+1, x>1. The point f(1)=3 is not included, the dot should be empty(open).
D. Point(1,1) is closed(filled circle), point (1,3) is open(empty circle).
The answer to this is answer b I hope that helps
Average cost per mile is $0.6
<h3>How to calculate the average cost per mile?</h3>
To calculate the average cost per mile that Kiara had to pay, we perform the following operations:
We add up all the payments Kiara made related to her car.
- $3,060 + $94 + $128 + $1,080 + $290 + $398 + $1,520 + $930 = $7,500
Later we divide the total value, in the number of miles traveled by Kiara
- $7,500 ÷ 12,500 miles = 0.6
Learn more about average in: brainly.com/question/2426692