To the 10th power of 0.25 to the 20th power of x2

To the 10th power of 0.25 to the 20th power of x2
=(1/4)^10×2^20
=[2^(-2)]^10×2^20
=2^(-20+20)
=2^0
=1

It takes 0.8 seconds for a person's heart to beat once, and the cardiac output is 5250 ml. what is the stroke output?

60 / 0.8 = 75 times / min
5250 / 75 = 70 ml
Hehe, is there anything I don't understand? I'm a physiology teacher

The third power of 2 × (X-5) = minus 54

（x-5）^3=-27
x-5=-3
x=2

RELATED INFORMATIONS

1. 50 power of 0.25 × 10 power of 256 × 20 power of (- 2)
2. People's life is 80 years old, then the number of heart beats in a person's life is calculated, and the result is expressed by scientific counting method
3. Nanchong Xichong County 2008-2009 junior high school mathematics final test questions (including answers)
4. If (x + 3) (X-5) = the square of X + kx-15m, then the value of K-M is A、-3 B、5 C、-2 D、2
5. It is known that the square of Y and x plus 1 is in positive proportion, and when x = 2, y = 10, find the functional relationship between Y and X
6. It is known that y is positively proportional to the square of X, and when x = - 1, y = - 3 (1) is the functional relation between Y and X
7. If f [10x power] = x, then f [5] is equal to= Let 10 ^ x = t, then x = LGT That is, f (x) = lgx ((why can t be changed into x in LGT in this step?) So f (5) = lg5
8. If a is greater than 0 and the square B of a is greater than 0, then the third power of a is the square of B___ 0
9. How many natural numbers can't be divisible by any number 3, 5 or 8
10. Fill in the three boxes of the six digit number 3, 2, 1 so that the number can be divided by 15. The smallest of the six digits is______ ．
11. In the Mariana Trench in the Pacific Ocean with a depth of 1 × 10 m to the fourth power, scientists have found fish swimming. What is the pressure on these fish? P seawater = 1.03 × 10 to the third power, kg / m to the third power 10 kg per kilogram
12. The blood vessels that the heart "collects" blood back to the heart are. The "structure" that the heart pumps blood out is. The blood vessels that these two structures pump blood into are The blood vessels that the heart "collects" blood back to the heart are_ ,_ What is the structure of the heart that pumps blood out_ ,_ These two structures respectively pump blood into the blood vessels_ ,_
13. Heart pumping process
14. A person's heart rate is 75 / min, 80 ml of blood is delivered per beat, and his blood pressure (which can be regarded as the average pressure of blood delivered by the heart) is 15000 PA ① The average power of this person's heart beating ② How high does this person's heart work in a day equal to lifting a one ton object? Our teacher said that this problem should be constantly publicized and deformed. If I change to power P = pressure PSV, I won't be able to do so. It's troublesome for experts to give advice,
15. I visited the Great Wall, the Palace Museum, the terracotta warriors and horses of the first emperor of Qin Dynasty, the Nanjing Yangtze River Bridge and other places of interest?
16. The Great Wall, the Palace Museum and the Nanjing Yangtze River Bridge are historic sites for Chinese and foreign tourists
17. The Great Wall, the Forbidden City and the Nanjing Yangtze River Bridge are places of interest in China
18. Xiao Wang invited his cousin to visit Beijing during the summer vacation. At that time, he visited the Great Wall, the summer palace, the Forbidden City and so on The content is that Xiao Wang invited his cousin to visit Beijing during the summer vacation. At that time, he visited the Great Wall, the summer palace and the Forbidden City Write as many letters as you can
19. The Palace Museum, summer palace and Yuanmingyuan
20. Composition about the Forbidden City in Beijing Similar to guide commentary urgent!