Questions on Algebra: Negative and Fractional exponents answered by real tutors!

Tutors Answer Your Questions about Exponents-negative-and-fractional (FREE)

Question 69745: how do you simplify 7(9 x 10^6)then write it in scientific notation?
Click here to see answer by stanbon(75887)

Question 69750: how do you write 6.9444 x 10^-3 in standard notation? and 0.4356 in scientific notation?
Click here to see answer by checkley75(3666)

Question 69759: how do you write 0.001076 in scientific notation and 1.08 x 10^7 in standard notation?
Click here to see answer by checkley75(3666)

Question 69734: how do you write 5.71 x 10^-5 in standard notation?
Click here to see answer by checkley75(3666)

Question 69758: how do you write 2.78 x 10^7 in standard notation?
Click here to see answer by stanbon(75887)

Question 69758: how do you write 2.78 x 10^7 in standard notation?
Click here to see answer by checkley75(3666)

Question 69757: how do you write 272.25 in scientific notation?
Click here to see answer by stanbon(75887)

Question 69757: how do you write 272.25 in scientific notation?
Click here to see answer by checkley75(3666)

Question 69740: how do you write 194 x 10^3 in scientific notation?
Click here to see answer by checkley75(3666)

Question 69775: how do you write 5.71 x 10^-5 in standard notation?
Click here to see answer by checkley75(3666)

Question 69799: how do you write 62040, 6.2 x 10^2, 6207 x 10^3, 6.34 x 10^-1 in order from least to greatest?
Click here to see answer by stanbon(75887)

Question 69787: How do you solve:
x^-2=9
Click here to see answer by bucky(2189)

Question 69925: how do you simlpify (7 x 10^7)(5 x 10^-5) then write it in scientific notation?
Click here to see answer by checkley75(3666)

Question 69924: how do you simplify (3d^-4)(5d^8)?
Click here to see answer by checkley75(3666)

Question 69945: What is 2 and 1 half
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Question 69922: (16)3/2
Click here to see answer by jim_thompson5910(35256)

Question 70182: Learning algebra as it applies to electronics. Having trouble with this one because I do not know what to do with the 1/2 shown in the equation.
x= -1/ [2phi(FC)1/2]
Click here to see answer by bucky(2189)

Question 70331: How do you multiply
Click here to see answer by josmiceli(19441)

Question 70331: How do you multiply
Click here to see answer by bucky(2189)

Question 70490: please help me solve this
z+7/9+1 = 2z+1/6
Click here to see answer by checkley75(3666)

Question 70452: how do you simplify 36.2 trillion/98.5 billion then write it in scientific notation?
Click here to see answer by checkley75(3666)

Question 70452: how do you simplify 36.2 trillion/98.5 billion then write it in scientific notation?
Click here to see answer by Smirnov(15)

Question 70444: how do you simplify n^9/n^15?
Click here to see answer by pleasuretohelp(9)

Question 70438: how do you simplify
Click here to see answer by Smirnov(15)

Question 70447: how do you simplify 9.5 x 10^9/5 x 10^12 then write it in scientific notation?
Click here to see answer by funmath(2933)

Question 70436: how do you simplify (-3/2^3)^-2?
Click here to see answer by funmath(2933)

Question 70427: How do you simplify a^6b^-5/a^-2b^7?
Click here to see answer by funmath(2933)

Question 70681: how do i work the problem -8 - 12
------------
2(-3) - (-2)
Click here to see answer by checkley75(3666)

Question 70697: Simplify each expression. Write each answer in scientific notation.
(0.4*10^0)(3*10^-4)
Click here to see answer by checkley75(3666)

Question 70696: The term mole can be used in chemistry to refer to 6.02*10^23 atoms of a substance. The mass of a single hydrogen atom is approximately 1.67*10^-24 gram. What is the mass of 1 mole of hydrogen atoms?
Click here to see answer by josmiceli(19441)

Question 70773:
1/F = 1/S + 1/U Solve for S
Click here to see answer by checkley75(3666)

Question 70777: Multiply: 7u^6 * 4u^3
Multiple choice answers.
A) 11u^9
B) 11u^18
C) 28u^18
D) 28u^9
I get 28u^18 is this right?
Click here to see answer by checkley75(3666)

Question 70777: Multiply: 7u^6 * 4u^3
Multiple choice answers.
A) 11u^9
B) 11u^18
C) 28u^18
D) 28u^9
I get 28u^18 is this right?
Click here to see answer by tutorcecilia(2152)

Question 70776: Combine like terms: 4y - z + 3y
Multiple Choice answers.
A) 7y - z
B) 6yz
C) 3y + 3z
D) 6y + z
The answer I keep getting is below and it does not match any of my choices.
Simplifying
4y + -1z + 3y
Reorder the terms:
4y + 3y + -1z
Combine like terms: 4y + 3y = 7y
Final result:7y + -1z

Click here to see answer by checkley75(3666)

Question 70912: Write each number in scientific notation.
9.3 million
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Question 70911: Write each number in scientific notation.
9,040,000,000
Click here to see answer by checkley75(3666)

Question 71035: Hi. Im stuck on some problems, its i know what to do but when i see the problems my mind goes blah. Please help.
1. 4 over x-3 = 3 over x-4
2. 3(x-4)-7(3x-5)+5(x-4)=3(2x-4)-17
Click here to see answer by checkley75(3666)

Question 71049: What is the sixth term when the first term is 4 and the common ratio is 3?
Click here to see answer by bucky(2189)

Question 71638: 21 = 2(4a + 2)
Click here to see answer by checkley75(3666)

Question 71872: The cost of living in a certain city has been increasing so much that an item that cost $1 today would cost (1.08)^t dollars in t years. Using this relationship, how much did today's one-dollar item cost 9 years ago?
Click here to see answer by stanbon(75887)

Question 72549: (-2)^-4
Click here to see answer by jim_thompson5910(35256)

Question 72549: (-2)^-4
Click here to see answer by Earlsdon(6294)

Question 72862: SIMPLIFY
1. 5x^3/(5x)^3
2. (7t^3/21t)^3
3. (2k^3/3k^-2)^-2
Click here to see answer by jmg(22)

Question 73168: Please show formula for: 1/a^-4 = a^4
Thanks!
Click here to see answer by stanbon(75887)

Question 73788: Use the rules of exponents to simply each expression:

Click here to see answer by psbhowmick(878)

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