If the earth's radius is approximately 3,963 miles, and if a hypothetical perpetual water-making machine pours out 32 gallons in the first minute and then doubles its capacity each minute, how long would it take for this hypothetical machine to fill up the earth with water?
?
A. 1 hr 15 min
B. 1 hr 12 min
C. 1 hr 17 min
D. 1 hr 13 min
E. 1 hr 10 min
Answer: D
Mathematics
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Write the number as an exponential expression, using the base shown. Check your result with a calculator.1 (base 8)
A. 80
B. 
C. 81
D. -80
Mathematics
Simplify.
2
A. 
B. 
C. 
D. 
Mathematics
Write the binomial expansion of the expression.
3
A. 
- 
+ 
- 7
y3
B. 
+ 
+ 
+ 7
y3
C. 
- 
+ 
- 7
y3
D. 
- 
- 
- 7
y3
Mathematics
Evaluate the exponential expression.62
A. 49 B. 64 C. 36 D. 12
Mathematics