Answer:
Step-by-step explanation:
'll just help with proving whether she is correct.
First of all, a fraction divided by a fraction can be made into multiplication since the division of two fractions is kinda difficult
so remember keep, change, flip
keep the first fractions, change the division symbol into multiplication, then flip the fraction i.e. 1/2 becomes 2/1
so 5/2 divided by 1/4 becomes
5/2 * 4/1
which then solved becomes
20/2 which is simplified to 10
Hope this helps :)
China could expect a quantity of visitors of 8.512 × 10⁶ in Chicago.
<h3>How to apply direct proportions</h3>
A <em>direct</em> proportion is a <em>direct</em> relationship between two variables, which in this case is represented between the quantity of tourists in the city of Chicago and the population of the country of origin.
Let suppose the existence of direct proportionality and world has a population of 9000 million people, the quantity of Chinese visitors in the city of Chicago is determined by the following formula:
x = (1.393 × 10⁹ / 9 × 10⁹) × 55 × 10⁶
x = 8.512 × 10⁶
China could expect a quantity of visitors of 8.512 × 10⁶ in Chicago. 
To learn more on direct proportions, we kindly invite to check this verified question: brainly.com/question/14389660
Y= -3x+17
Y-y1= m(X-X11)
-3 is m
5 is X1
2is Y1
Y-2=-3)X-5)
Y-2= -3x+15
Add2
Y=-3x+17
When something has a negative power you must move it to the denominator to give it a positive power therefore this would then turn into 1/[(5/4)^4] to simplify this (5/4)^4 would be (25/16)(25/16) then finally (625/256) so it would then look like this 1/(625/256) in order to not have a fraction in the denominator you would multiply; 1 x (256/625) which is 256/625.