Write the number in scientific notation.
One milligram is about 0.015430 grain.
A. 0.1543 × 10-1
B. 15.43 × 10-3
C. 1.543 × 10-2
D. 1.543 × 10-3
E. 0.015430 × 10-2
Answer: C
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A. Yes B. No
Use the formula for the sum of the first n terms of a geometric sequence to solve.Find the sum of the first six terms of the geometric sequence: -3, -15, -75, . . . .
A. 11718 B. - 3906 C. -93 D. - 11718
Fill in the blank with one of the words or phrases listed below. 
The basic unit of length in the metric system is the 
.
A. perimeter B. meter C. gram D. liter
Solve.A rectangular Persian carpet has a perimeter of 196 inches. The length of the carpet is 18 inches more than the width. What are the dimensions of the carpet?
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