Simplify. Write the answer with positive exponents.

A. t-3
B. t9
C. t-9
D. t3


Answer: D

Mathematics

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Use the division method to find the GCF. If the GCF is 1, write relatively prime.51 and 98

A. 51 B. 98 C. 4998 D. relatively prime

Mathematics

Solve the problem.Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students and B's to the next 23%. What is the bottom cutoff for a B grade? Round your answer to the nearest whole number.

A. 74 B. 66 C. 76 D. 71

Mathematics

Solve the problem.A rectangle has area of 130 square meters. Its length and width are whole numbers. Which measurements give the smallest perimeter?

A. 2 meters by 65 meters B. 5 meters by 26 meters C. 10 meters by 13 meters D. 9 meters by 13 meters

Mathematics

Simplify, if possible, by combining like terms.2st2 - 9st2 

A. -7st2  B. 7st2  C. -7s2t4  D. Cannot be simplified

Mathematics