Solve the problem.On a 620 mile road trip, out to Yellowstone National Park Toby's average speed was x miles per hour. On his return trip, he averaged 15 miles per hour more than his trip to the park. The time that it took Toby to drive to the park can be represented by the rational expression 
, while the time it took Toby to return home can be represented by the rational expression 
. a. Write a simplified rational expression that describes the difference in the time it took Toby to drive to the park and the time it took him to return home. b. What was the difference in the time
it took Toby to drive to the park and the time it took him to return home if he averaged 61 miles per hour on his drive home? Round your answer to the nearest tenth .
A. a. 
;
b. 3.3 hour(s)
B. a. 
;
b. 3.3 hour(s)
C. a. 
;
b. 1.3 hour(s)
D. a. 
;
b. 4130.1 hour(s)
Answer: A
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Evaluate the integral.
A. 4
+ C
B. 4
+ C
C. 4
+ C
D. 4
+ C
Solve the problem by writing an appropriate system of equations and using the inverse of the coefficient matrix to solve the system.The sum of the angles of a triangle is 180°. The largest angle is the sum of the smaller two angles and is 30° more than twice the smallest angle. What is the measure of the smallest angle?
A. 45° B. 17° C. 30° D. 90°
Solve.The volume of wood in a tree varies jointly as the height of the tree and the square of the distance around the tree trunk. If the volume of wood is src="https://sciemce.com/media/4/ppg__tttt0701191244__f1q68g5.jpg" alt="" style="vertical-align: -4.0px;" /> around the trunk?
A. 35.84 ft3
B. 39.84 ft3
C. 27.84 ft3
D. 44.84 ft3
when the height is 
and the distance around the trunk is 
what is the volume of wood obtained from a tree that is 
tall having a measurement of
Place the correct symbol, <, >, or =, in the blank between the expressions.-|16| 
-16
A. = B. < C. >