Answer:
1020.5
Step-by-step explanation:
3.14×(5)^2×13= 1020.5 cubic units
There are 90 4-digit palindromes
<h3>What are palindromes?</h3>
Palindromes are numbers whose reverse is the same as the original number
<h3>How to determine the count of 4-digit palindromes</h3>
Since the digit is 4, then
- The first digit of the palindrome can be any of 1 to 9 (i.e. 9 digits)
- The second digit can be any of 0 - 9 (i.e. 10 digits)
- The third digit must be the second digit (i.e. 1 digit)
- The last digit must be the first digit (i.e. 1 digit)
So, the total number of digits is:
Evaluate the product
Hence, there are 90 4-digit palindromes.
Read more about numbers at:
brainly.com/question/251701
So what,there is no question here
Answer:
2.1 miles
Step-by-step explanation:
Given that :
Total distance = 13.1 miles
Distance between each water stop = 2.75 miles
Distance between last water stop and end of the race
We need to find the maximum number of water stops :
Total miles / distance between water stops
13.1 / 2.75
= 4.763
Maximum number of water stops = 4
Distance to last water stop = 4 * 2.75 = 11 miles
Hence, distance between last water stop and end of Race :
Total miles - distance to last water stop
13.1 miles - 11 miles
= 2.1 miles
Let the cost of a chicken be x and the cost of a duck, y, then
50x + 30y = 550 . . . (1)
44x + 36y = 532 . . . (2)
(1) x 6 ⇒ 300x + 180y = 3,300 . . . (3)
(2) x 5 ⇒ 220x + 180y = 2,660 . . . (4)
(3) - (4) ⇒ 80x = 640
⇒ x = 640 / 80 = 8
From (1): 50(8) + 30y = 550
⇒ 30y = 550 - 400 = 150
⇒ y = 150 / 30 = 5
Therefore, the price of a chicken is $8 and the price of a duck is $5.
