15*1.6 + 15 * .8 =
24 +12=36
He needs 36 dollars
If he has 25 dollars, he is short 11 dollars
7 and 0, 3 1/2+3 1/2=7, 3 1/2- 3 1/2=0
From there just distribute and simplify.
Answer:
Distance between the observer and the red car is 
Step-by-step explanation:
Diameter of field = 500 m
Radius of field =
Let R be the radius and the speed at which the car completes race be w
So,
Car finished 5 laps in minutes = 30
Car finished 1 lap in minutes = 
So, 
Refer the attached figure
Angle between car and observer = wt
So, Distance between the observer and the red car is give as A sin wt
So, Distance between the observer and the red car=
He would pay about a $47.04 in total because 15% of $40.9 is about $6.14