05/25/21

Use the Laws of Exponents to rewrite and simplify the expression.
1 / 3nth root of x^81 over 3 nth root of x^8 not 1 third...any help would be much appreciated, this is a question that comes up alot yet i cant seem to grasp on how to get the answer
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05/20/21

exponential functions
A scientist counts 35 bacteria present in a culture and finds that the number of bacteria triples each hour. The function  models the number of bacteria after x hours. Estimate when there will be... more
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05/20/21

Use the electron-transfer method to balance the equation
Balance the equation involving the reaction of aluminum with hydrochloric acid to produce to aluminum chloride and hydrogen gas.there's 6 steps in this which is:1.) Write the skeletal equation2.)... more
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05/20/21

A hypnotist’s watch hanging from a chain swings back and forth every 0.90s. What is the frequency (in Hz) of its oscillation?
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05/20/21

Need help solving problem

Give an expression for f(x) with leading coefficient −5, of degree 3, and having roots x=5 , x=−4−3i, and x=−4+3i.My answer was x^3+3x^2-15x-125 which is incorrect
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05/19/21

I got wrong answer for this question but it's close to choice e is this correct?

Magnesium metal reacts with hydrochloric acid to form magnesium chloride and hydrogen gas. Suppose we react an excess of magnesium metal with 19.0 mL of a 3.00 M solution of hydrochloric acid and... more
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05/19/21

A cello string vibrates in its fundamental node with a frequency of 220 Hz. The string's vibrating length is 49.2 cm.

(A) Find the speed of the wave on this string. __________(B) Find the frequency of this string when it vibrates with 6 nodes and 5 anti-nodes. __________
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05/16/21

Please help with this question, thank you
In a manufacturing process it is estimated that 0.1% of the products are defective. If a client places an order for 25 of the products, what is the probability that at least two of them are... more
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05/16/21

What will be the tolerance of a resistor having no 4th band?
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05/16/21

Q; In a manufacturing process it is estimated that 0.1% of the products are defective.
In a manufacturing process it is estimated that 0.1% of the products are defective. If a client places an order for 25 of the products, what is the probability that at least two of them are... more
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05/12/21

How do I find the surface area of a cone with just the radius and the height?
I have to find the surface area of a cone with a radius of 45.7 mm and a height of 39.7 mm there’s also a hint that tells me to use the Pythagorean theorem to calculate the slant height..
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05/12/21

Physics (resistance)
Two identical resistors connected in series have an equivalent resistance of 8 ohms. The same two resistors, when connected in parallel, will have an equivalent resistance of..
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05/12/21

Probability word problem
You need to select a President, Vice President, and Treasurer from a class of 25. If 17 of the students are boys, what is the probability that all three students on the committee are girls? Leave... more
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05/10/21

Please help me solve this

In 1998, the population of a colony is 10,000, and is decreasing exponentially at 1.5% per year. a) What will the population be after 5 years?b) In what year will there be half of the population... more
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05/10/21

From a standard deck, how many five-card hands contain the following?
e) one face cardPlease explain and show steps, this one was confusing!
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04/24/21

solve the following problem
In the experiment for the synthesis of paracetamol, 7.5 g of P-aminophenol (Mwt= 109.1 g/mol) is placed in a test tube containing 20 ml water, followed by adding 8 ml acetic acid (density=1.08... more
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04/21/21

Physics 11(ramp problem)
it takes a force of 250n to push the block shown here up the incline at a constant speed. assume that the applied force is parallel to the surface of the incline. the block has a mass of 25 kg and... more
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04/21/21

needing good explanation on what to do. HELP NEEDED
tutor I believe I am correct but i keep second guessing myself . Can you please explain what im doing wrong ? If 10 square feet of carpet costs $22.99, how much does 30 square feet cost?  i took... more
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04/14/21

Decay rate,k is 8.1% per year=-0.081. What is the half-life in years
Need some assistance, any help is greatly appreciated. Thanks!
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04/11/21

Which of the following indicates a spontaneous reaction under standard conditions?
a) K = 8.6x10^-2b) K = 7.9x10^-8c) K = 2.2x10^2d) K= 9.2x10^-45e) K = 0.14
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04/11/21

Find possible coordinates of Vertex D
The shape ABCD is parallelogram where A(1,2,3), B(0,-2,1), and C(2,0,-3), find possible coordinates of vertex D.
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04/03/21

calculuss helpp
 Find the parametric equations for the line through the point P = (2, 4, -5) that is perpendicular to the plane −1𝑥+1𝑦−2𝑧=1.−1x+1y−2z=1.Use "t" as your variable, t = 0 should correspond to P, and... more
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04/02/21

% yield of the reaction
If 933g of CO2 is produced from the combustion of 4.79 moles of pentane with excess O2 what is the % yield for the reaction?C5 H12 (l) + 8O2(g)--> 5CO2 (g) + 6H2O(g)
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04/02/21

Polynomials, urgent please help
Use synthetic division to rewrite the following fraction in the form  q(x)+r(x)/d(x), where d(x) is the denominator of the original fraction, q(x) is the quotient, and r(x) is the... more
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04/02/21

Calculate the [H3O+] of an aqueous solution that is 1.94 × 10−7 M in OH−. Enter your answer in scientific notation.
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