Answer the question.Consider the numbers 7, 
, -9, 0, 0.
, 
, 
. Which are natural numbers?
A. 7
B. 7, 0
C. 7, 0, 
D. 7, 
Answer: D
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A company installs 5,000 light bulbs. The lifetimes of the lightbulbs are approximately normally distributed with a mean of 500 hours and a standard deviation of 100 hours. Find the approximate number of bulbs that can be expected to last the indicated amount of time.Less than 500 hours
A. 3,000 B. 2,500 C. 1,000 D. 2,400
Evaluate the integral by using a substitution prior to integration by parts.
A. x 
2 - 2x 
+ 2x + C
B. x 
2 - 2x 
+ C
C. x 
2 - x 
+ x + C
D. x 
2 + 2x 
- 2x + C
Let x represent one number and let y represent the other number. Use the given conditions to write a system of nonlinear equations. Solve the system and find the numbers.The sum of the squares of two numbers is 13. The sum of the two numbers is 5. Find the two numbers.
A. -3 and -2 B. -3 and 2; -2 and 3 C. 2 and 3; -3 and -2 D. 2 and 3
What is
