# A culture starts at 8600 bacteria. After one hour the count is 10,000. Find a function that models the number of bacteria n(t) after t hours. The answer is n(t) = 8600e^.1506t Where does this 0.1506 come from?

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or the compound: carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation state of the metal +1? d count 6? total electron count 20? coordination number 7?
2. ## Data Analyse

Question 1 Production Rates A manufacturing company wishes to estimate the number of items that its workforce can produce on average each hour now that they have a new machine. The factory examined the records for a random sample of 8 hours over the past
3. ## Science

West Fremont is a community of 3,000 homes. A coal burning power plant supplies electricity for the town. The capacity of the plant is 12 megawatts, and the average household consumes 8,000 kilowatt hours a year. Assuming that the power plant can operate
4. ## statistics

The number of hours that college students sleep on a week night is approximated by a normal curve with a mean of 7 hours and a standard deviation of 1.7 hours. Answer the question below using a z table: On a week night, what percentage of students sleep
5. ## calculus

Two positive numbers have a sum of 60. what is the maximum product of one number times the square of the second number? a) 3481 b) 3600 c) 27,000 d) 32,000 e) 36,000 So Idk if this is right, but I have .... x+y=60 p=xy^2 p=x(60-x)^2 P'=-2x(60-x)+(60-x^2)
6. ## Biology

Do I have these right? Each of these have one or two words that make them confusing and tricky. Hypothesis – a tentative, testable explanation of an observed phenomenon. Observation – a piece of the natural world is observed to work in a certain way
7. ## math word problem

Here's the latest from the UMW math department: Andy drove from Richmond to Boston at an average speed of 50 miles per hour. If it took 5 hours to drive from Richmond to Philadelphia at an average speed of 70 miles per hour and if the whole trip took 13
8. ## math

which numbers should you add to estimate the answer to this problem: 87,087 + 98.000 - 88,000+ 98,000 -85,000+95,000 - 87,000 +98,000 - 80,000+ 90,000 thanks for your help!
9. ## math

this was emily's full day yesterday: she spent 8 hours sleeping, 1 hour in the shower, 6 hours in class, 2 hours eating and snacking, 4 hours studying, and 3 hiurs watching tv. What percent of her day was spent studying.
10. ## Genetics

Need help figure out the order of GENES. Okey here is the info Bacterial cells of genotype pur- pro+ his+ were transduce with P1 bacteriophage grown on bacteria of genotype pur+ pro- his-. Transductants containing pur+ were selected and tested for the
11. ## Math Algebra 2

Ok im stumped on this HW problem can anyone help? The Blue clothing company makes both shirts and pants. Each shirt gives a profit of $25, while a pair of pants yields$55. Both shirts and pants are made using machines and human labor. A single shirt takes
12. ## math

I need help with part b of this question. A racquetball club charges $15 per month plus$6 for each hour of court time, and only whole numbers of hours of court time can be purchased. Let x be the number of hours of playing racquetball in a given month,
13. ## health

If a patient without a spleen compare to a patient with a spleen had a blood smear done it would most likely reveal, "many more fragile and old erythrocytes or many more bacteria. I have read and reread this and I keep finding these 2 now I am stuck help
14. ## exponential equations

Listeria has a current population of 400 organisms. After 72 minutes the population increased to 6400 organisms. Calculate the doubling time, d, of the bacteria.
15. ## Math

Joelle earns her regular pay of 7.50 per hour for up to 40 hours a week. for each hour over 40 hours of work in a week, joelle is paid 1.5 times her regular pay. how much does joelle earn for a week in which she works 42 hours?
16. ## math

lionel says the digits in his mystery number have a sum of 6. you say this mystery number if you count by 3's or count by 4's. what is lionel's mystery number?
17. ## calculus

For time, t, in hours, 0\le t\le1, a bug is crawling at a velocity, v, in meters/hour given by v = \frac{5}{1 + t}. Use \Delta t = 0.2 to estimate the distance that the bug crawls during this hour. Find an overestimate and an underestimate. Then average
18. ## math

write each number in scientific notation 3.68,000=6.8x10^4 4.7,000,000=7x10^6 5.30,500,000,000=3.05x10^10 6.73,280,000=7.328x10^7
19. ## maths

kelvin and smith are incharged of counting people who gets of the lift they turn riding to floor an dback down counting as a go sfter two such trips each morning and two in evening their is an avarage taken the hotel manager wants tono the days avarage (a)
20. ## Algebra 1

Nico drives from school to the store at 25 miles per hour. He drives back to the school (along the same route) at 35 miles per hour, and the returns to the store (via the same route) travelling at 40 miles per hour. Find the average rate for the three
21. ## Math help and check

Which kind of function best models the set of data points (–1, 22), (0, 6), (1, –10), (2, –26), and (3, –42)? linear **** quadratic exponential none of the above 2. Which kind of function best models the set of data points (–3, 18), (–2, 6),
22. ## algebra 1

What is the speed, in miles per hour, of a toy car that runs 40 feet in 8 seconds? Round your answer to the nearest whole number. (1 hour = 3600; 1 mile = 5280 ft)

45. ## math

A 200-miles trip by an electric automobile must be completed in 4 hours. If it takes x number of hours to travel the first half of the distance, write an equation describing the average speed for the second half of the trip as a function of x for the
46. ## Math

How can I convert mm to cm and cm to mm Look at the metric system, a part of which is shown below. The prefixes are kilo hecto deka unit--grams, liters, meters, etc. deci centi milli Stearting anywhere on the scale of prefixes above, count the number of
47. ## maths

Solve 1.-6b+1+4b= -3b+6 2.8x - 4x = -8 3.the sum of twice a number and 14 less than the number is the same as the difference between -38 and the number. what is the number? 4. some number is six more than eight. what is the number? 5. 3.2x + 5.6x = 3.1 +
48. ## Math

I need help in seeing if I solved these inequality problems correctly. 1. A store sells two models of computers. Because of the demand, the store stocks at least twice as many units of model A as of model B. The costs to the store for the two models are
49. ## Chemistry

Use enthalpies of formation from the textbook to calculate the standard enthalpy of the reaction for the following methane- generating reaction of methanogenic bacteria given delta Hf of CH3NH2=-22.97kJ/mol: 4CH2NH2+2H2O----->3CH4+CO2+4NH3
50. ## biology

If a particular experiment were known to have a transformation efficiency of 3 x 10^3 bacteria/µg of DNA, how many transformant colonies would be expected to grow on the LB/amp/ara plate? You can assume that the concentration of DNA and fraction of cells
51. ## time speed and distance

P, Q and R start from the same place X at (a) kmph, (a+b) kmph and (a+2b) kmph respectively.  If Q starts p hours after P, how many hours after Q should R start, so that both Q and R overtake P at the same time? Answer is pa/a+2b Please solve this
52. ## pre-calculus honors

GENERATE A FUNCTION THAT MODELS THE SITUATION. Consider the type of function described—it is not linear! A shipping company charges $4 for the first pound and$3 for each additional pound or part thereof. As you try to come up with the equation, consider
53. ## pre-calculus honors

GENERATE A FUNCTION THAT MODELS THE SITUATION. Consider the type of function described—it is not linear! A shipping company charges $4 for the first pound and$3 for each additional pound or part thereof. As you try to come up with the equation, consider
54. ## Math

A greyhound can run as fast as 39.35mph per hour without calculating,would about 12,14 ,or 16 be reasonable answer for the number of miles a greyhound could run at this rate in 0.4 hour. My answer is about 16 because 60 min.divided by 0.4 is about 15. Am I
55. ## Math

A woman rides her bicycle from her house to and from a lake. It takes her 1 1/2 hours to ride to the lake and 1 3/4 hours to ride back. She rides downhill at 12 kilometers per hour, on level ground at 8 kilometers per hour, and uphill at 6 kilometers per
56. ## math

One month, ruby worked 6 hours more than Isac, and Svetlana worked 4 times as many hours as Ruby. Together they worked 126 hours. Find the number of hours each person worked
57. ## Linear Algebra

A company separates iron, zinc, and kryptonite from ore by the floatation separation process, which has three steps: oiling, mixing, and separation. These steps must be applied for 4, 5, and 1 hour respectively to produce one unit of iron; 4, 4, and 1 hour
58. ## Math

Plutonium-239 has a half-life of 24 000 years. What percent of plutonium-239 remains after 10 000 years? (Answer=74.9%) AND After 30 hours, a sample of Plutonium 243 (PU^ 243) has decayed to 4 ^ -1/3 of its original mass. What is the half life of PU^ 243.
59. ## math

A certain antibioyic reducesthe number of bacteria in your body by 10% each dose a) if four doses of the antibiotic are taken, what percent of the original bacterial population is left. b) biologists have determined that when a person has a bacterial
60. ## Math correct

AM I RIGHT?? simplify (2x^2y^2z)^2(x^4y)^5 I CAME WITH 4x^13y^9z^2 FOR THE ANSWER.. convert the number to scientifc notation 13,550,000,000 I CAME WITH 1.355x10^9 FOR THE ANSWER
61. ## math

A profit function is derived from the production cost and revenue function for a given item. The monthly profit function for a certain item is given by P(x)=−0.05x^2+400x−100,000, where P is in dollars and x is the number of units sold. a. How

70. ## algebra-word problem

2001-2005 number hours user spent on the internet each week increased 110% by hours. This percent increased amount to 11 hours. Find the average number of hours that a user spent on the internet in each week in 2001 and 2005. Having problems with setting
71. ## Chemistry

a radioisotope is called a tracer when it is used to 1 kill bacteria 2 kill cancerous cells determine the age of animal skeletal remains 4 determine the path of an element in an organism is it 3 ?
72. ## exponential equations

A colony of Salmonella bacteria has a current population of 1000 organisms. If this particular strain has a doubling time, d, of 18 minutes, calculate the future population after 180 minutes.
73. ## The Graphical Method

A manufacturer produces two models of mountain bikes. Model A requires 5 hours of assembly time and 2 hours of painting time, and Model B requires 4 hours of assembly time and 3 hours of painting time. The maximum total weekly hours available in the

i need help please with two question ,one of is: 1 Six students slept 8 1/2 hours.What total number of hours do these six values represent ?MY ANSWER IS 51 on THE picture is scale from 6 1/2 TO 10 2 Oliva said "the longest time value is 1 1/2 times the
75. ## Algebra3!!!!

How would you would graph the linear equation y = -2x + 6? First plot the point (6,0) and then count up two and to the right 1. First plot the point (6,0) and then count down two and to the right 1 First plot the point (0,6) and then count up two and to
76. ## Algebra

In an assembly line of a factory, which produces networking switching hubs, two robots are utilized. The first one (A) is able to produce 40 microchips per hour, whereas the second one (B) produces 30 microchips per hour. For a total production of 400
77. ## Algebra 1

Which kind of function best models the set of data points: -1,22 0,6 1,-10 2,-26 and 3,-42? linear quadratic exponential non e of the above my answer is linear
78. ## Math

Trina works after school and on weekends. she always works three days each week. this week she worked 2 3/4 hours on monday, 3 3/5 hours on friday and 5 1/2 hours on saturday. next week she plans to work the same number of hours as this week, but will work
79. ## math

trina works after school and on weekends. she always works three days each week. this week she worked 2 3/4 hours on monday, 3 3/5 hours on friday and 5 1/2 hours on saturday. next week she plans to work the same number of hours as this week, but will work
80. ## art

I have to choose a sculpture from the greece / rome era, and write down who the artist or which prehistoric culture its from. Since most of the sculptures don't have an artist, Can i write the sculpture is from the classical period? Does that count as a
81. ## programming

Write a program that requests the numeric grades on a midterm and a final exam and then uses a Function procedure to assign a semester grade (A, B, C, D, OR F). The final exam should count twice as much as the midterm exam, the semester average should be
82. ## Math

A store has rows of T-shirts, with 8 shirts in each row. How many T-shirts are there in all? Answer,, 3*8=24 2/ there are 3groups of hikers in the Rain Forest Hiking Club. There are 7hikers in each group. Draw arrows on the number line below to skip count
83. ## math

Business and finance. Julio works as a quality control expert in a beverage factory. The assembly line that he monitors produces about 20,000 bottles in a 24-hour period. Julio samples about 120 bottles an hour and rejects the line he finds more than 1/50
84. ## Physics

You are driving home on a weekend from school at 65mph for 130 miles. It then starts to snow and you slow to 45 mph. You arrive home after driving 4 hours. How far is your hometown from school? First I found the time with d/v=t so 130/65= 2 hours I used d=
85. ## College Accounting 211

A Corporation uses a predetermined overhead rate of $23.90 per direct labor hour. This predetermined rate was based on a cost formula that estmated$286,8000 of total manufacturing overhead for an estimated activity level of 12,000 direct labor hours. The
86. ## PreCalc

The temperature T(t) varies sinusoidally on a certain day in December. The minimum temperature is 35 degrees Fahrenheit at midnight. The maximum temperature is 50 degrees Fahrenheit at noon. Let t be the number of hours since midnight (t=o at midnight).
87. ## Economics

Asher is a stay at home dad who provides math tutoring for extra cash. At a wage of $30 per hour, he is willing to tutor 5 hours per week. At$45 per hour, he is willing to tutor 6 hours per week. Using the midpoint method, the elasticity of Asher’s
88. ## Algebra

I have a few questions I need help with. They are to help review for our exam. 4) Without graphing, is each system independent, dependent, or inconsistent? -x-3y=0 x-y=4 (i believe dependent) dependent independent inconsistent 6) Which matrix represents

95. ## Science

Some possible properties of modern insecticides are listed below, When these insecticides are used which property helps to keep environmental pollution at the lowest level? A. Accumulation in the bodies of predators. B. Quiqly broken down by bacteria. C.
96. ## biology

Which of the following words or phrases describes the heterotrophic bacteria, the cyanobacteria, both or neither? a.lack of nuclear envelope b.photosynthesize similarly to green plants c.possess a cell wall d.eukaryotic cells e.symbiotic relationships
97. ## Science

Which interaction BEST illustrates the concept of mutualism? A) Jaguars feeding on wild pigs. B) Squirrels playing with other squirrels. C) Malaria protozoans living on the blood of a host. D) Nitrogen-fixing bacteria in root nodules of legumes. I think
98. ## Science

Some possible properties of modern insecticides are listed below, When these insecticides are used which property helps to keep environmental pollution at the lowest level? A. Accumulation in the bodies of predators. B. Quiqly broken down by bacteria. C.
99. ## math

the vcr mystery nancy watched the movie shoes n socks on her vcr. the movie lasted 1 hour and 45 minutes. at the end of the movie, the meter on the vcr read + 1:30. What was the reading on the meter when the movie began? Add 1 hour 45 min to 1 hour 30 min