

1. 
The equation where d represents the distance in miles and t is the number of seconds between seeing lightening and hearing thunder, tells how far away a thunderstorm is. How far is it to a thunderstorm if you count 15 seconds between seeing the lightening and hearing the thunder? 


A. 
3 miles 
B. 
10 miles 


C. 
1 mile 
D. 
15 miles 


Hint 


2. 
Evaluate b^{3} + 6 if b = 2. 


A. 
512 
B. 
14 


C. 
12 
D. 
15 


Hint 


3. 
Evaluate 5k + if k = 3, m = 20, and n. = 5. 


A. 
20 
B. 
7 


C. 
57 
D. 
19 


Hint 


4. 
In physics, the number measures the force of gravity between two objects when a and b each stand for the mass one of the objects and d stands for the distance between them. Find the force of gravity when a = 5, b = 8, and d = 2. 


A. 
20 
B. 
5 


C. 
40 
D. 
10 


Hint 


5. 
Evaluate x^{2} + 2xy + y^{2} if = 4 and y = 7. 


A. 
78 
B. 
86 


C. 
121 
D. 
65 


Hint 


