Tutors Answer Your Questions about Equations (FREE)
Question 1193145: Cabrina and Dabney are attending a conference. After the conference, Cabrina drives home to Boise at an average speed of 75 miles per hour and Dabney drives home to Portland at an average speed of 60 miles per hour. If the sum of their driving times is 10.1 hours and if the sum of the distances driven is 711 miles, determine the time each woman spent driving home.
Click here to see answer by ankor@dixie-net.com(22740)   |
Question 1193146: A person plans to invest a total of $5500 in one bank account at 3.4% annual interest and another bank account at 15% annual interest. How much should he invest in each account so that the total interest in one year will be $477?
Click here to see answer by greenestamps(13198)  |
Question 1193181: I am trying to figure out a math practice problem for the PSAT. The question is below:
5(k+2)-7 = 13-(4-k)
-------- ---------
6 9
In the equation above, what is the value of k?
1). 9 2). 9 3). 33 4). 33
--- --- ---- ---
17 13 17 13
My email address is docmaine@yahoo.com
Click here to see answer by greenestamps(13198) |
Question 1193391: Raina works as a tutor for $7 an hour and as a waitress for $12 an hour. This month, she worked a combined total of 97 hours at her two jobs.
Let t be the number of hours Raina worked as a tutor this month. Write an expression for the combined total dollar amount she earned this month.
Click here to see answer by Theo(13342)  |
Question 1193391: Raina works as a tutor for $7 an hour and as a waitress for $12 an hour. This month, she worked a combined total of 97 hours at her two jobs.
Let t be the number of hours Raina worked as a tutor this month. Write an expression for the combined total dollar amount she earned this month.
Click here to see answer by ikleyn(52776)  |
Question 1193391: Raina works as a tutor for $7 an hour and as a waitress for $12 an hour. This month, she worked a combined total of 97 hours at her two jobs.
Let t be the number of hours Raina worked as a tutor this month. Write an expression for the combined total dollar amount she earned this month.
Click here to see answer by josgarithmetic(39616) |
Question 1193512: 3.b. ‘Bhartdarshan’ is an Internet-based travel agency wherein customers can see videos of the cities they plan to visit. The number of hits daily is a normally distributed random variable with a mean of 10,000 and a standard deviation of 2,400.
a. What is the probability of getting more than 12,000 hits?
b. What is the probability of getting fewer than 9,000 hits?
Click here to see answer by ikleyn(52776) |
Question 1193551: Use the following formula, where P is the present value of A dollars t years from now, earning annual interest r compounded n times per year.
P=A(1+r/n)^-nt
Find the present value of $400,000 20 years from now, if interest is compounded semiannually at 11.4%.
The present value is approximately $___
(Round to the nearest hundred as needed.)
thank you for your generosity!!
Click here to see answer by Boreal(15235)  |
Question 1193551: Use the following formula, where P is the present value of A dollars t years from now, earning annual interest r compounded n times per year.
P=A(1+r/n)^-nt
Find the present value of $400,000 20 years from now, if interest is compounded semiannually at 11.4%.
The present value is approximately $___
(Round to the nearest hundred as needed.)
thank you for your generosity!!
Click here to see answer by ikleyn(52776) |
Question 1193550: hi! any help would be very helpful! thank you!
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How much time will be needed for $30,000 to grow to $34,466.45 if deposited at 7% compounded quarterly?
The amount $30,000 will grow to $34,466.45 in___ year(s).
(Do not round until the final answer. Then round to the nearest tenth as needed.)
Click here to see answer by Boreal(15235) |
Question 1193550: hi! any help would be very helpful! thank you!
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How much time will be needed for $30,000 to grow to $34,466.45 if deposited at 7% compounded quarterly?
The amount $30,000 will grow to $34,466.45 in___ year(s).
(Do not round until the final answer. Then round to the nearest tenth as needed.)
Click here to see answer by ikleyn(52776) |
Question 1193549: hello! I have been trying to figure out how to do this for a while and cant seem to grasp it, any help is appreciated! thank you (:
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The amount of carbon 14 present in a paint after t years is given by A(t)=A o e^-0.00012t. The paint contains 15% of its carbon 14. Estimate the age of the paint.
(Round to the nearest year as needed.)
Click here to see answer by Boreal(15235) |
Question 1193549: hello! I have been trying to figure out how to do this for a while and cant seem to grasp it, any help is appreciated! thank you (:
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The amount of carbon 14 present in a paint after t years is given by A(t)=A o e^-0.00012t. The paint contains 15% of its carbon 14. Estimate the age of the paint.
(Round to the nearest year as needed.)
Click here to see answer by ikleyn(52776) |
Question 1193733: What interest rate would be necessary to obtain $6500 in 8 years if $5000 is the amount of the original investment and the interest is compounded yearly?
the interest rate needed is ______ %
(Do not round until the final answer. Then round to the nearest tenth as needed.)
Click here to see answer by ikleyn(52776) |
Question 1193732: The half-life of a radioactive substance is 36.1 years.
a. Find the exponential decay model for this substance.
A(t)=A0e^__t (Round to the nearest tenth)
b. How long will it take a sample of 400 grams to decay to 300 grams?
Approximately ___ years (Round to the nearest hundredth)
c. How much of the sample of 400 grams will remain after 20 years?
About ___ Grams (Round to the nearest integer)
Click here to see answer by josgarithmetic(39616) |
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33526..33570, 33571..33615, 33616..33660, 33661..33705, 33706..33750, 33751..33795, 33796..33840, 33841..33885, 33886..33930, 33931..33975, 33976..34020, 34021..34065, 34066..34110, 34111..34155, 34156..34200, 34201..34245, 34246..34290, 34291..34335, 34336..34380, 34381..34425, 34426..34470, 34471..34515, 34516..34560, 34561..34605, 34606..34650, 34651..34695, 34696..34740, 34741..34785, 34786..34830, 34831..34875, 34876..34920, 34921..34965, 34966..35010, 35011..35055, 35056..35100, 35101..35145, 35146..35190, 35191..35235, 35236..35280, 35281..35325, 35326..35370, 35371..35415, 35416..35460, 35461..35505, 35506..35550, 35551..35595, 35596..35640, 35641..35685, 35686..35730, 35731..35775, 35776..35820, 35821..35865, 35866..35910, 35911..35955, 35956..36000, 36001..36045, 36046..36090, 36091..36135, 36136..36180, 36181..36225, 36226..36270, 36271..36315, 36316..36360, 36361..36405, 36406..36450, 36451..36495, 36496..36540, 36541..36585, 36586..36630, 36631..36675, 36676..36720, 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39916..39960, 39961..40005, 40006..40050, 40051..40095, 40096..40140, 40141..40185, 40186..40230, 40231..40275, 40276..40320, 40321..40365, 40366..40410, 40411..40455, 40456..40500, 40501..40545, 40546..40590, 40591..40635, 40636..40680, 40681..40725, 40726..40770, 40771..40815, 40816..40860, 40861..40905, 40906..40950, 40951..40995, 40996..41040, 41041..41085, 41086..41130, 41131..41175, 41176..41220, 41221..41265, 41266..41310, 41311..41355, 41356..41400, 41401..41445, 41446..41490, 41491..41535, 41536..41580
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