TUTORIAL ANSWERS 450-472

 

 
 

 

Correct Answer to Question 450: b) is correct. In this calculation you add exponents:102 x 104=10(2+4)=106.

Help: Fundamentals of Sound, Sec. 10-L.

Return to Question 450.

 


 

 

Correct Answer to Question 455:  c) is correct. To move the decimal one place to the left you increase the exponent by 1. 36.7 x 105=3.67 x 10 x 105=3.67 x 101 x 105=3.67 x 106

Help: Fundamentals of Sound, Sec. 10-J.

Return to Question 455.

 


 

 

Correct Answer to Question 460:  c) is correct. To move the decimal one place to the right you add -1 to the exponent. 0.283 x 10-6=2.83 x (1/10) x 10-6= 2.83 x 10-1 x 10-6=2.83 x 10-7

Help: Fundamentals of Sound, Sec. 10-J.

Return to Question 460.

 


 

 

Correct Answer to Question 465: a) is correct. To divide one power of ten by another you subtract the exponent in the denominator from that in the numerator. 10-2/10-6= 10-2-(-6)= 10-2+6 = 104

Help: Fundamentals of Sound, Sec. 10-L.

Return to Question 465.

 


 

 

Correct Answer to Question 470:   c) is correct. To add numbers with different powers of ten you must put both into the same power of ten. One way is to write 8 x 106 =0.8 x 107. Now both numbers have the same power of ten. Simply add the numbers:
     7 x 107
 -0.8 x 107
_________
6.2 x 107

Help: Fundamentals of Sound, Sec. 10-K.

Return to Question 470.

 


 

 

Correct Answer to Question 472: d) is correct. To add numbers with different powers of ten you must put both into the same power of ten. You might write 0.3 x 10-1 = 30 x 10-3. Now both numbers have the same power of ten. Simply add the numbers:
5 x 10-3
30 x 10-3
_________
35 x 10-3.

This last number is equivalent to 3.5 x 10-2.

Help: Fundamentals of Sound, Sec. 10-K.

Return to Question 472.

 


ab_webmaster@abacon.com
©2002 William J. Mullin
Legal Notice