The formula d = rt gives the distance traveled in time t at rate r. a bicyclist rides at a constant rate of 15 miles per hour. how many miles will she travel in 3.5 hours?

a. 52.5
b. 4.3
c. 23.3
d. 18.5

The answer is: [A]:  52.5 (mi.) 
________________________________________
Explanation:
_________________________
Use the formula: D = r*t .
_________________________
{Note of interest: The formula is not unique to this specific problem; but is actually true and will appear in physics and even advanced math and calculus!).
____________________________________________
In which: D = distance traveled (which we want to solve);
                  r = rate of travel; which we are given as: "15 mi / h" ;
                  t  = time traveled; which we are given as: "3.5 h" ,
______________________________________________
We want to solve for "D".
______________________
 Make sure all the units are equal (which they are!). They are all in "mi." and "hours".  And the questions asks for the value in miles
___________________________________
D = r * t ; solve for "D" ; by plugging in our known values of "r" and "t":
____________________________________
→ D = r * t  =  * (3.5 h) ;  
____________________________________
→ The 2 "h's" cancel out; and we are left with:
______________________________________
→ D = (15 mi.) * 3.5 = 52.5 mi. → which is answer choice: [A].
______________________________________

The full question isn’t shown. part of it is cut off

Yeah she/ he needs look how long that is man