Solve the problem.Under standard conditions, molecules of a gas collide billions of times per second. If each molecule has diameter t, the average distance between collisions is given by 
where n, the volume density of the gas, is a constant. Find 
.
A. 
= - 
B. 
= - 
C. 
= 
D. 
= - 
Answer: C
Mathematics
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Use both properties of equality to solve the equation.7x + 5 = 2x - 20
A. -5 B. 4 C. 5 D. -4
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Divide. Write with positive exponents.
A. 9x4 + 3x3 + 2
B. 9x4 + 3x + 2x2
C. 9x2 + 3x + 2
D. 
x4 + 
x3 + 1
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Simplify, leaving exponents in the answer.
2
A. 
B. 
C. 
D. 
Mathematics
Write a word name for the number in the sentence.The sales tax rate in Lincoln County is 4.09 percent.
A. Four and nine thousandths B. Four and nine ten-thousandths C. Four and nine hundredths D. Four and nine tenths
Mathematics