Find the sum, if it exists.3 - 
+ 
- 
+ . . .
A. 
B. - 
C. - 
D. Does not exist
Answer: D
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Simplify the expression without a calculator.
-2
A. 
B. - 
C. - 
D. 
Solve the problem.Brand X copier has improved its copier so that it produces 24% more copies than its old model. If the old model ran 490 copies per hour, how many copies would the new model run? Round to the nearest whole number.
A. 593 copies B. 278 copies C. 505 copies D. 608 copies
First, use front end rounding to estimate each answer. Then find the exact answer.Light travels 186,000 miles per second. How many miles does it travel in 
A. estimate: 190,000 ? 800 = 152,000,000 miles; exact: 147,126,000 miles B. estimate: 190,000 ? 790 = 150,100,000 miles; exact: 147,126,000 miles C. estimate: 200,000 ? 790 = 158,000,000 miles; exact: 147,126,000 miles D. estimate: 200,000 ? 800 = 160,000,000 miles; exact: 147,126,000 miles
Find the standard form of the equation of the ellipse satisfying the given conditions.Foci at (0, -4), (0, 4); y-intercepts: (0, -7), (0, 7)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1