Questions on Algebra: Exponents and operations on exponents answered by real tutors!

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Question 477751: what is the unit digit of 7raisedto 155 how to solve it?
Click here to see answer by ikleyn(52943)

Question 1198080: Find the periodic payments PMT necessary to accumulate the given amount in an annuity account. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest cent.)
$50,000 in a fund paying 5% per year, with monthly payments for 5 years, if the fund contains $10,000 at the start
Click here to see answer by ikleyn(52943)

Question 1046030: Please help me solving
If then the value of
is given by?
Click here to see answer by MathTherapy(10559)

Question 1209868: If 2^{16^x} = 128*4^x, then find 2^x.
Click here to see answer by ikleyn(52943)

Question 1209868: If 2^{16^x} = 128*4^x, then find 2^x.
Click here to see answer by Edwin McCravy(20067)

Question 1171449: ``The value of function -10000e^(-0.03x)-120x+10000 at its critical points is

Click here to see answer by CPhill(1987)

Question 1209332: For the equation (a-b)^2 + a^2 = 625, a and b are integers and a≥0. List the ordered pairs that occur.
Click here to see answer by greenestamps(13216)

Question 1198081: The following table shows the average life expectancies in several countries. Assume that all premiums you calculate are based on end-of-month deposits in a fund yielding 6.8% annual interest compounded monthly to be paid out when a person reaches the life expectancy. HINT [See Example 2.]
Country Japan Canada U.K. U.S. Mexico China India
Life
Expectancy:
Male 80 80 79 76 73 74 64
Life
Expectancy:
Female 87 84 83 81 79 77 68
Calculate the life insurance monthly premium that a 50-year-old female in Japan would pay for a $10,000,000 policy. (Round your answer to the nearest cent.)
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Question 1209210: 10 to the power of -11
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Question 1208443: 8x10 exponent -4 in standard notation

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Question 1208239: A sugar ant is approximately 2 × 10^−3 meters long. If you put 10 million sugar
ants in a line, what is the distance from end to end?
 200 meters
 2,000 meters
 20,000 meters
 200,000 meters
Click here to see answer by MathTherapy(10559)

Question 1208304: (6x^2)^-1/6 all divided by (32x^5/2)^-2/5
Click here to see answer by mccravyedwin(410)

Question 1208150: Given the following table, determine if the function is linear, or nonlinear. If linear, find the slope.

Table

x............f(x)
-2...........1/4
-1...........1/2
0............1
1............2
2............4

Thanks.

Click here to see answer by ikleyn(52943)

Question 1207521: please evaluate the expression 3a+4b3 when a=6 and 6=2

Click here to see answer by math_tutor2020(3820)

Question 1207258: Simplify
20^10/40^5 20 to the 10th divided by 40 to the 5th
Click here to see answer by greenestamps(13216)

Question 1207258: Simplify
20^10/40^5 20 to the 10th divided by 40 to the 5th
Click here to see answer by Theo(13342)

Question 1206763: Why does a base number to the exponent of zero equals 1?
When a number is multiplied zero times, shouldn't it be zero?
Example: 10 (exponent zero) = 1.

Click here to see answer by MathTherapy(10559)

Question 1206831: Simplyfiy p2-3b
Click here to see answer by josgarithmetic(39632)

Question 1206397: Find the value of a/(b^3xc^2) in index form if a = (2/5)^4, b=(-1/3)^3 and c= (3/5)^2
Click here to see answer by ikleyn(52943)

Question 1206397: Find the value of a/(b^3xc^2) in index form if a = (2/5)^4, b=(-1/3)^3 and c= (3/5)^2
Click here to see answer by greenestamps(13216)

Question 1206369: (16x to the -4 power) to the 2nd power

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Question 1205815: (-3yx^3)^4

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Question 1205815: (-3yx^3)^4

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Question 1205144: A bacteria culture is started with 100 bacteria. After 7 hours, the population has grown to 600 bacteria. If the population grows exponentially, find the rate of growth in percent
Click here to see answer by greenestamps(13216)

Question 1204752: If 6^(2x+1) = k, then 6^(4x+3) equals
A 12k
B k^2 + 6
C 6k^2
D 2k + 6
E 36k^2
Click here to see answer by MathTherapy(10559)

Question 1204752: If 6^(2x+1) = k, then 6^(4x+3) equals
A 12k
B k^2 + 6
C 6k^2
D 2k + 6
E 36k^2
Click here to see answer by math_tutor2020(3820)

Question 1204752: If 6^(2x+1) = k, then 6^(4x+3) equals
A 12k
B k^2 + 6
C 6k^2
D 2k + 6
E 36k^2
Click here to see answer by Edwin McCravy(20067)

Question 1204752: If 6^(2x+1) = k, then 6^(4x+3) equals
A 12k
B k^2 + 6
C 6k^2
D 2k + 6
E 36k^2
Click here to see answer by ikleyn(52943)

Question 1204836: If 6^(2x+1)=k , then 6^(4x+3) equals:
A) 12k
B) k^2 + 6
C) 6k^2
D) 2k+6
E) 36k^2
Click here to see answer by ikleyn(52943)

Question 1204836: If 6^(2x+1)=k , then 6^(4x+3) equals:
A) 12k
B) k^2 + 6
C) 6k^2
D) 2k+6
E) 36k^2
Click here to see answer by Edwin McCravy(20067)

Question 1204808: if 6^(2x+1) =k, then 6^(4x+3 ) equals
Click here to see answer by greenestamps(13216)

Question 1204808: if 6^(2x+1) =k, then 6^(4x+3 ) equals
Click here to see answer by ikleyn(52943)

Question 1204808: if 6^(2x+1) =k, then 6^(4x+3 ) equals
Click here to see answer by Edwin McCravy(20067)

Question 1204549: a uranium atom has a mass of 3.95 x 10^-22 grams. A sample of uranium has a mass of 9.085 x 10^-1 grams. Determine how many atoms are in the sample using scientific notation
please help I have a math test tomorrow
Click here to see answer by josgarithmetic(39632)

Question 1204458: A uranium atom has a mass of 3.95× 10^−22 grams. A sample of uranium
has a mass of 9.085×10^−1 grams. Determine how many atoms are in
the sample using scientific notation?
Ⓐ 2.3× 10^−23
Ⓑ 2.3 × 10^21
Ⓒ 3.6 × 10^−22
Ⓓ 3.6 × 10^20
Click here to see answer by mananth(16946)

Question 1204295: What can you say about the functions graphed below? Explain your reasoning: Is it a log or an exponential? For an exponential, is the exponent x or -x? What is the equation for the asymptote? Which direction and how many units is it shifted?
Graph A) https://app.gemoo.com/share/image-annotation/572889363786969088?codeId=Ml2kEYAjRgoXb&origin=imageurlgenerator
Graph B) https://app.gemoo.com/share/image-annotation/572889769845932032?codeId=v6gK8ZKQR0YZa&origin=imageurlgenerator
Click here to see answer by math_tutor2020(3820)

Question 1204273: 3 to the -7th power times 2 to the -4th power
Click here to see answer by Boreal(15235)

Question 1203032: Determine the value of k such that the trinomial 4x^2-kx+81 is a perfect square (such as (ax+b)^2.
Click here to see answer by ikleyn(52943)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020