Write the whole number in the sentence in standard form.The volume of water in the lake is eight hundred twenty-one million, ninety-four thousand, six hundred thirteen gallons.
A. 82,194,613
B. 821,940,613
C. 821,094,613
D. 821,000,094,613
Answer: C
Mathematics
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Perform the indicated operation. Simplify if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Construct a possibility tree that shows all possible 2-letter code words using only the letters x and y with repetition allowed.
A.
| /\ |
| x | y |
| /\ | /\ |
| x | y | x | y |
B.
| | |
| x |
| | |
| y |
C.
| /\ |
| x | y |
| | | | |
| y | x |
D.
| /\ |
| x | y |
| /| | | |
| x | y | x |
Mathematics
Express the product as a sum containing only sines or cosines.-2 sin (5?) sin ?
A. cos (6?) - cos (4?) B. cos (7?) + cos (3?) C. cos (7?) - cos (3?) D. cos (6?) + cos (4?)
Mathematics
Solve the problem.Jim has gotten scores of 62 and 91 on his first two tests. What score must he get on his third test to keep an average of 80 or better?
A. at least 77 B. at least 76.5 C. at least 87 D. at least 85
Mathematics