Tutors Answer Your Questions about Sequences-and-series (FREE)
Question 1138660: A game involves earning points by rolling a special 6-sided die that says 13 on three faces, 23 on two, and 28 on the sixth face. What's the expected number of points a player will earn by rolling this die?
Click here to see answer by Boreal(15235)   |
Question 1138670: (144,108,81,60.75,...)
Is the sequence arithmetic, geometric, or neither?
-I said geometric
Write an expression for the nth term.
-I'm not sure what equation is supposed to be used. I'm pretty sure It's either:
-Sn=a1(1-r^n/1-r) or Sn=n(a1+an/2)
Calculate the first 10 terms. Express your answer to 5 places past the decimal.
-Would I used one of the formulas above and just plug in 1-10?
Does the sequence above have an infinite sum? If so, calculate the infinite sum. If not, tell why it does not have an infinite sum.
- Is infinite sum a different equation? I don't know what that is
Click here to see answer by josgarithmetic(39618) |
Question 1138670: (144,108,81,60.75,...)
Is the sequence arithmetic, geometric, or neither?
-I said geometric
Write an expression for the nth term.
-I'm not sure what equation is supposed to be used. I'm pretty sure It's either:
-Sn=a1(1-r^n/1-r) or Sn=n(a1+an/2)
Calculate the first 10 terms. Express your answer to 5 places past the decimal.
-Would I used one of the formulas above and just plug in 1-10?
Does the sequence above have an infinite sum? If so, calculate the infinite sum. If not, tell why it does not have an infinite sum.
- Is infinite sum a different equation? I don't know what that is
Click here to see answer by jim_thompson5910(35256) |
Question 1139210: 3, -6, 12, 4, 20, ?
7, 16, 8, 27, 9, ?
2, 7, 26, 101, 400, ?
7, 21, 8, 72, 9, ?
Click here to see answer by ikleyn(52788)  |
Question 1139262: 4.
a. The common difference in an arithmetic sequence is 8 and the sum of the first 14 terms is 966,
find the first term?
b. Solve 4x^2 − 9x ≤ 9.
c. Given that q is the number of ball pumps people are willing to buy per week from a manufacturer
at a price of 1200 − 60√q + 27 dollars .
i. Write an expression R, for total revenue.
ii. Find marginal revenue,dR/dq when q = 12.
Click here to see answer by josgarithmetic(39618) |
Question 1139262: 4.
a. The common difference in an arithmetic sequence is 8 and the sum of the first 14 terms is 966,
find the first term?
b. Solve 4x^2 − 9x ≤ 9.
c. Given that q is the number of ball pumps people are willing to buy per week from a manufacturer
at a price of 1200 − 60√q + 27 dollars .
i. Write an expression R, for total revenue.
ii. Find marginal revenue,dR/dq when q = 12.
Click here to see answer by ikleyn(52788) |
Question 1139966: A spinner is divided into 4 sections. The spinner is spun 100 times.
The probability distribution shows the results.
What is P(2 ≤ x ≤ 4)?
Is my answer correct?
The question and my answer are in the link here: https://prnt.sc/nhi27m
Click here to see answer by rothauserc(4718)  |
Question 1139963: In a medical study, the heights of a group of men were measured to the nearest inch.
There were 120 men with heights of 60 - 64 inches, 280 men with heights of 65 - 69 inches, 312 men with heights of 70 - 74 inches, and 162 men with heights of 75 - 79 inches.
Which probability distribution table best reflects the data?
Is my answer correct?
The question and my answer are in the link here: https://prnt.sc/nhhyi2
Click here to see answer by MathLover1(20850)  |
Question 1140087: What is the next number in this sequence?
106, 63, 63, 55, 32, 98, 7, 8, 19, 38, 63, 66, 83, 55, 13, 35, 63, 59, 52, 108, 50, 71, 29, 3, 19
Click here to see answer by greenestamps(13200)  |
Question 1140087: What is the next number in this sequence?
106, 63, 63, 55, 32, 98, 7, 8, 19, 38, 63, 66, 83, 55, 13, 35, 63, 59, 52, 108, 50, 71, 29, 3, 19
Click here to see answer by ikleyn(52788) |
Question 1140401: The price of petrol in Phnom Penh was x cents per liter in December 2016. In April 2017 the price
had increased by 12 cents per liter.
a) How many liters of petrol could be bought with $58 in December 2016?
b) How many liters of petrol could be bought with $58 in April 2017?
c) If the difference in the number of liters of petrol bought in December 2016 and April 2017 is 4 11, 16
form an equation in x and show that it reduces to 𝑥2 + 12𝑥 − 14848 = 0.
d) Solve the equation in (c) and use it to find the number of liters of petrol that could be bought with
$34 in December 2016, giving your answer correct to 1 decimal place.
Click here to see answer by greenestamps(13200) |
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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, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790
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