07/22/22

The count in a bacteria culture was 200 after 20 minutes and 1500 after 35 minutes Pls help me answer this question

The count in a bacteria culture was 200 after 20 minutes and 1500 after 35 minutes. Assuming the count grows exponentially, What was the initial size of the cultie? Find the doubling period. Find... more
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07/22/22

Help please At the beginning of an experiment
At the beginning of an experiment, a scientist has 240 grams of radioactive goo. After 195 minutes, her sample has decayed to 30 grams. What is the half-life of the goo in minutes? Find a formula... more
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07/21/22

Find all values of m for which the equation has two real solutions. 9u^2-7u=(m-3) Write your answer starting with m, followed by an equal sign or inequality symbol (for example, m<5).
Reduce all fractions
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07/21/22

Solve simultaneous equation

Solve the following simultaneous equations:2𝑥−𝑦−5=0𝑎𝑛𝑑𝑥+11+2𝑦=21
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07/21/22

Solve the following inequalities and give your answer in interval notation
Solve the following inequalities and give your answer in interval notationa). −14<−7(3𝑥+2)<4(3−𝑥)
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07/21/22

question 4 week 3
Write the logarithmic equation log7x = y in exponential form. please show steps
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07/21/22

week 3 question 7
Find the amount of money accumulated if you invest $10,000 at 3% interest compounded continuously for 2 years. Round your answer to the nearest cent.please show steps
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07/21/22

Worded question need help to solve
After a recycling program was introduced, the weight of rubbish disposed by a organisation each month is given by W = 80(3 - 0.026m ) W = measured in kg.m = number of months since the recycling... more
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07/21/22

Need help to solve this Word problem please
(t + 20)(N - 40) = 1300N = The number of bacteria per square mm, that remains on the hands when washing t seconds hand liquid. How would I express the N as a function of t ? Determine the number... more
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07/21/22

The half-life of Nobelium-259 is 58 minutes. After 3 hours a sample still contains 10 mg. What was the initial mass of the sample, and how much will remain after another 8 hours?
The half-life of Nobelium-259 is 58 minutes. After 3 hours a sample still contains 10 mg. What was the initial mass of the sample, and how much will remain after another 8 hours?
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07/20/22

The length of a parking lot is 8 yards more than the width If the area of the parking lot is 84 square yards, find the dimensions of the parking lot
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07/18/22

19. Calculate Jonia’s WHR using the waist and hip measurements provided. Show your work.

Word ProblemThe Waist to Hip Ratio (WHR) is commonly expressed as a decimal. WHR has been shown to be a good predictor of possible cardiovascular problems in both men and women. If Jonia has a WHR... more
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07/18/22

Percents of prices
Nikki bought a suit on sale for $231. This price was 34% less of the original price. What is the original price?
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07/18/22

math equations

Flying against the jetstream, a jet travels 4320 miles in 4 hours. Flying with the jetstream, the same jet travels 9240 miles in 7 hours. What is the rate of the jet in still air and what is the... more
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07/17/22

A car was valued at $27,000 in the year 1995. The value depreciated to $13,000 by the year 2000.
A car was valued at $27,000 in the year 1995. The value depreciated to $13,000 by the year 2000. A) What was the annual rate of change between 1995 and 2000? T = Round the rate of decrease to 4... more
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07/17/22

Solve the quadratic equation; 2x^2 -15x = 0
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07/17/22

Solve the quadratic equation; (5x - 1)^2 = 4/25
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07/17/22

Solve the quadratic equation; x^2 = 121
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07/17/22

The polynomial of degree 3, P(x), has a root of multiplicity 2 at x=4 and a root of multiplicity 1 at x= -1. The y intercept is y= -6.4
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07/17/22

The polynomial of degree 3, P(x), has a root of multiplicity 2 at x=4 and a root of multiplicity 1 at x= -1. The y intercept is y= -6.4
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07/16/22

The difference between 2 numbers is 3024 the greater number is 7 times the smaller number what is the sum of the two numers?
Could somebody explain this in detail if possible for my 9yo son PLEASE thank you.The difference between 2 numbers is 3024 the greater number is 7 times the smaller number what is the sum of the... more
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07/16/22

what would the answer be to this question
A radio tower is located 425 feet from a building. From a window in the building, a person determines that the angle of elevation to the top of the tower is 26∘ and that the angle of depression to... more
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07/16/22

How do I become a tutor at Wyzant
Hello, I have worked as a teacher and tutor for 30 years. I am always looking for ways to expand my base. A local school guidance counselor mentioned that they primarily use Wyzant referrals. How... more
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07/16/22

a long distance cell phone company charges .99 for the first 20 min or less of a call. (ex: 15 mins cost .99) and 7 mins for every min thereafter
a long distance cell phone company charges .99 for the first 20 min or less of a call. (ex: 15 mins cost .99) and 7 mins for every min thereafterWrite a precise definition of the charge f(x) of a... more
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07/16/22

the polynomial of degree 5,p(x), has a leading coefficient of 1,has roots of multiplicity 2 at x=1 and x=0 and a root of multiplicity 1 at x "-1"
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