# Posts by Hannah

Total # Posts: 3,323

**math**

2. A bacteria population grows exponentially with growth rate k=2.5 how long it would take for the bacteria population to double its size?

*November 12, 2013*

**math**

1.The remains of an old campﬁre are unearthed and it is found that there is only 80% as much radioactive carbon-14 in the charcoal samples from the campﬁre as there is in modern living trees. If the half-life of carbon- 14 is 5730 years, how long ago did the camp...

*November 12, 2013*

**math**

A cafeteria has 5 turkey sandwiches, 6 cheese sandwiches, and 4 tuna sandwiches. There are two students in line and each will take a sandwich. What is the probability that the first student takes a cheese sandwich and the next student takes a turkey sandwich?

*November 12, 2013*

**algebra 2**

In a shipment of alarm clocks, the probability that one alarm clock is defective is 0.04. Charlie selects three alarm clocks at random. If he puts each clock back with the rest of the shipment before selecting the next one, what is the probability that all three alarm clocks ...

*November 12, 2013*

**algerbra 2**

would this be 20 %

*November 12, 2013*

**algerbra 2**

There is a 10% chance it will rain on Saturday and a 30% chance it will rain on Sunday. What percent chance is there that it will rain on both Saturday and Sunday

*November 12, 2013*

**Math**

What is the y-intercept for the equation x=3y-6=0?

*November 11, 2013*

**Math**

What is the y-intercept for the equation x=3y-6=0?

*November 11, 2013*

**Math**

Write the equation of a line whose slope is the same as the line y=-2x=7 and whose y-intercept is the same as the line 2y=x-8.

*November 11, 2013*

**science**

During road construction a section of rock is cleared which contains many fossils each shovel of rock removed from the trench uncovers several fossils some of the fossils That are exposed include a prehistoric fish petrified wood water plant imprints and jawbone from a giant ...

*November 11, 2013*

**Statistics**

C) 2.3

*November 10, 2013*

**Science**

The answers are D,B,A,C incase anyone in 2016 is looking lol

*November 10, 2013*

**History!!!!**

were they correct ms.sue?

*November 7, 2013*

**biology**

Enzymes in the human body work in a very wide range of conditions. A. True B. False

*November 6, 2013*

**biology**

please help

*November 6, 2013*

**biology**

Substance X is converted to substance Y in a chemical reaction. What role would a catalyst play in this scenario? A. It would increase the solubility of substance X into the solvent needed to speed up the reaction. B. It would speed up the reaction by becoming part of the ...

*November 6, 2013*

**biology**

an experiment, a scientist notices that an enzyme’s catalytic rate decreases when the pH of the environment is changed. Which of the following best summarizes the effect of pH on the enzyme? A. pH changes the shape of the enzyme. B. pH takes energy away from the enzyme, ...

*November 6, 2013*

**science**

2. How do enzymes impact biochemical reactions in the body? A. Enzymes are catalysts to biochemical reactions. B. Enzymes lower the activation energy of biochemical reactions. C. Enzymes can speed up biochemical reactions. D. All of the above are correct.

*November 6, 2013*

**science**

1. In an experiment, a scientist notices that an enzyme’s catalytic rate decreases when the pH of the environment is changed. Which of the following best summarizes the effect of pH on the enzyme? A. pH changes the shape of the enzyme. B. pH takes energy away from the ...

*November 6, 2013*

**biology**

Sulfur has six electrons in its outer most energy level. In ionic bonding, it would tend to _____________________________. A. take on two more electrons B. give away two electrons C. give away six electrons D. not take on anymore ...

*November 6, 2013*

**biology**

Which of the following involve electronic charges? A. hydrogen bonds B. ionic bonds C. polar molecules D. all of the above

*November 6, 2013*

**algebra**

I have a problem with this: y=1.5x Questions: What is the rate of change between the variables? State whether the y values are increasing or decreasing, or neither, as x increases Give the y intercept List the coordinates of two points that lie on the graph of the line in the ...

*November 5, 2013*

**biology**

Which of the following involve electronic charges? A. hydrogen bonds B. ionic bonds C. polar molecules D. all of the above

*November 5, 2013*

**biology**

please help

*November 5, 2013*

**biology**

Sulfur has six electrons in its outer most energy level. In ionic bonding, it would tend to _____________________________. A. take on two more electrons B. give away two electrons C. give away six electrons D. not take on anymore ...

*November 5, 2013*

**social studies**

What is a possible explanation of why China abandoned overseas exploration in 1435? A. China could not develop advanced naval technology. B. The voyages of Zheng He failed to impress local rulers. C. Confucian scholars wanted to protect China’s traditions. D. The Chinese ...

*November 5, 2013*

**algebra 2**

Isabella shipped a 5-pound package for $4. She shipped a 3-pound package for $3.60 and a 1-pound package for $3.20. A 10-pound package cost $5 to ship. The shipping cost follows a pattern based on the weight of the package. Which expression can be used to calculate the ...

*November 5, 2013*

**algerbra 2**

1. Marissa is a photographer. She sells framed photographs for $100 each and greeting cards for $5 each. The materials for each framed photograph cost $30, and the materials for each greeting card cost $2. Marissa can sell up to 8 framed photographs and 40 greeting cards each ...

*November 5, 2013*

**Chemistry**

please explain

*November 5, 2013*

**Physics (Please check)**

So I just want to make sure I did the math corretly: My value for angle of incidence was 20 degrees and for refraction it was 15 so I did Sin(20) / sin (15) = 1.32 which is very close to the accepted value. Is this corret?

*November 4, 2013*

**Physics (Please check)**

Calculate the index (n water) of refraction of water given the angle of incidence and the angle of refraction. I know that the accepted value for n is 1.33 but I am not sure how to calculate the index. Would I use Snell's law: na sin Qa = nb sin Qb? Thank you!

*November 4, 2013*

**Math**

What would this look like in an equation in slope intercept form? through (-3,4) and (3,-4) Would it be Y=4/3x+0 ??

*November 4, 2013*

**Math**

What would this look like in an equation in slope intercept form? X-intercept -4, Y-intercept -2 Would it be Y=-1/2x+2 ??

*November 4, 2013*

**Math**

What would this look like in an equation in slope intercept form? through (0,7) and (1,9) Would it be Y= 2/1x+7 ?

*November 4, 2013*

**Math**

How would you put this in an equation in slope intercept form? what would it look like? X-intercept -4, Y-intercept -2

*November 3, 2013*

**Math**

How would you put this in an equation in slope intercept form? what would it look like? Y-intercept -5, X-intercept 3

*November 3, 2013*

**Math**

How would you put this in an equation in slope intercept form? what would it look like? Slope -3; x-intercept 3

*November 3, 2013*

**Math**

How would you put this in an equation in slope intercept form? what would it look like? Slope 1/2 ; x-intercept 4

*November 3, 2013*

**English**

Is that correct?

*November 3, 2013*

**English**

False

*November 3, 2013*

**English**

Whitman, Bradstreet, and Wheatley included sensory details in their poetry. True/False

*November 3, 2013*

**algebra**

please help with my other ones

*November 3, 2013*

**algebra**

last one write an equation of the line that passess through 10,-4 and is perpendicular to the line whose equation is y=2/5x+8 help

*November 3, 2013*

**algebra**

I am confused on what to do with this?

*November 3, 2013*

**algebra**

find an equation of the line that passess throught 0.-6 amd 5, 3

*November 3, 2013*

**algebra**

wtite an equatiom of the line through 5,-3 and -2 and -8 in slope intercept form

*November 3, 2013*

**algebra**

one line paasses through -3,-2 and -2,1 and another line passes through -1,2 and 2,1 what is the relationship between the lines are they parrelle, perpendicular, or neither?

*November 3, 2013*

**algebra**

In a line with a slope of 1/2 a perpendicular to another line, the the slope of the is -2 true or false

*November 2, 2013*

**algebra 2**

by 10 there are 25 people admitted to a park by 11 there are 50 what would a slope of zero between 2 consecutive hours mean and can the line between 2 consecutive numbers have a negative slope

*November 2, 2013*

**math 5th grade**

How to solve 547X73

*November 1, 2013*

**algebra 2**

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

*November 1, 2013*

**algebra 2**

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

*November 1, 2013*

**math 5th grade**

How to solve 547X73

*November 1, 2013*

**algebra**

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

*October 31, 2013*

**algebra 2**

the 2 unequalities -26<4k-2 and 2k-1<6 A. Write a compound inequality to combine the inequalities shown previously. and B. Solve the compound inequality for values of k. Show your work. Write your final answer as one inequality. please help

*October 31, 2013*

**Geometry**

A ladder 12 m in length rests against a wall. The foot of the ladder is 3 m from the wall. What is the measure of the angle the ladder forms with the floor?

*October 31, 2013*

**math**

is 3/8 more,less than or equal to 40%

*October 30, 2013*

**algebra 2**

please help me with this

*October 29, 2013*

**algebra 2**

A garden supply store sells two types of lawn mowers. The cashiers kept a tally chart for the total number of mowers sold. They tallied 30 mowers sold. Total sales of mowers for the year were $8379.70. The small mowers cost $249.99 and the large mowers cost $329.99. Find the ...

*October 29, 2013*

**algebra 2**

You have $22 in your bank account, and you deposit $11.50 per week. Your cousin has $218 in his bank account and is withdrawing $13 per week. The graph of this problem situation intersects at x=8. What does this mean? A. In 8 weeks, you will have triple the amount of money in...

*October 29, 2013*

**algebra 2**

A garden supply store sells two types of lawn mowers. The cashiers kept a tally chart for the total number of mowers sold. They tallied 30 mowers sold. Total sales of mowers for the year were $8379.70. The small mowers cost $249.99 and the large mowers cost $329.99. Find the ...

*October 29, 2013*

**algebra 2**

I need to graph these what would be the equations x=300 y=-300 x=200 y = 400/3 are these the correct answers

*October 29, 2013*

**algebra 2**

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

*October 29, 2013*

**algera**

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

*October 27, 2013*

**algebra 2**

Ms. Tweed earns $12 an hour. Deductions for taxes and insurance take 25 percent of her earnings. Which equation could be solved to find Ms. Tweed’s take-home pay, p, after 80 hours of work?

*October 27, 2013*

**algebra 2**

A. 75 = 10d + 5n B. 75 = 10d · 5n C. 75 = dn D. 75 = d + n

*October 27, 2013*

**algebra 2**

please help me with this would it be 75=10D+5N

*October 27, 2013*

**algebra 2**

Marshall has $1.25 in dimes, d, and nickels, n, in his pocket. Which equation could be solved to find the possible combinations of dimes and nickels Marshall has?

*October 27, 2013*

**biology**

Covalent bonds are not affected by chemical reactions. true ir false

*October 24, 2013*

**biology**

please help

*October 24, 2013*

**biology**

What are the reactants in the following chemical formula? C6H12O6 + 6O2 ¨ 6CO2 + 6H2O

*October 24, 2013*

**algebra 2**

would 90=3y+2-5y be right

*October 24, 2013*

**algebra 2**

. A tile setter is joining the angles of two tiles, A and B, to make a 90-degree angle. The degree measure of Angle A can be represented as 3y + 2 and of Angle B as 5y. Which equation represents this situation? these are the one I neeeed help with

*October 24, 2013*

**algebra 2**

One-fourth of the distance between two cities is 100 miles less than two-thirds the distance between the cities. Which equation expresses this situation?

*October 24, 2013*

**algebra 2**

do you guys tutor

*October 24, 2013*

**algebra 2**

7.15 =1/3 P+4.50 or 7.16=1/3 (p+4.50)

*October 24, 2013*

**algebra 2**

yes

*October 24, 2013*

**algebra 2**

Three friends share the cost of a pizza. The base price of the pizza is p and the extra toppings cost $4.50. If each person’s share was $7.15, which equation could be used to find p, the base price of the pizza?

*October 24, 2013*

**algerbra 2**

Lisa buys a carpet for $230. The price is $3.50 per square foot. If Lisa had a special discount of $50 off, which linear equation could be used to find the area, A, of the carpet?

*October 24, 2013*

**algebra**

A restaurant meal for a group of people cost $85 total. This amount included a 6% tax and an 18% tip, both based on the price of the food. Which equation could be used to find f, the cost of the food

*October 24, 2013*

**Algebra 1**

I'm having trouble putting these equations in standard form. PLEASE HELP ME!!! Y=12x+4 Y= -8x+-5 Y=-2x+8 Y=5x+5 Y=18x+-3

*October 23, 2013*

**algebra 2**

that is a division signs '

*October 23, 2013*

**algebra 2**

how do you simplify 5-x _______ x^2-20 to = 4

*October 23, 2013*

**algebra**

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

*October 23, 2013*

**algerbra 2**

C. The company accountant says that the rational expression will never have a zero denominator because , the number of units, is always a whole number. Explain why the accountant is correct. 20^-180/4^2+36x+72 this is the second part can you help me

*October 23, 2013*

**algerbra 2**

B. The rational expression is not defined for any values of 20^2-180/4x^2+36+ 72 for which the denominator equals zero. Find the value(s) of for which the denominator equals zero.

*October 23, 2013*

**algebra 2**

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

*October 23, 2013*

**biology**

4. Using sunscreen and consuming energy drinks involve _____________________. A. using biological information to make informed decisions B. risks to using biotechnology C. using genomics to make informed decisions D. all of the above

*October 23, 2013*

**biology**

A sheep with human genes spliced into it to produce human antibodies is an example of a(n)

*October 23, 2013*

**algebra 2**

On a second report that you reviewed, the team simplified the expression to 4. Show how to simplify the rational expression correctly. Explain your steps so that the team understands how to simplify an expression similar to this in future experiments.

*October 23, 2013*

**alg**

A clothing company uses the expressions that follow to estimate revenue and expenses based on the production of x lots of clothes: Revenue: Expenses: The ratio of revenue to expenses is represented by the rational expression that follows: A. Factor the numerator and ...

*October 23, 2013*

**algebra 2**

3x2 – 12x + 7x – 28 factor the polynomial by grouping

*October 22, 2013*

**algebra 2**

here is the last part of the question Another canvas of size B has a width of 2x+3 and a length of 6x-1. Write a polynomial expression, in simplified form, that expresses the difference in area of canvas size A and canvas size B

*October 21, 2013*

**algebra 2**

can you please help me with this

*October 21, 2013*

**algebra 2**

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

*October 21, 2013*

**quantum physics**

the quantum factor algorithm for N=91 is carried out. What is the period k of the periodic superposition set up if it chooses x=8? Guys please help...its very urgent!!

*October 18, 2013*

**quantum physics**

@anony i got 8 d.help me with 6 a

*October 17, 2013*

**Math Critical Thinking**

2years=24months

*October 16, 2013*

**allgebra**

can you help me with this last one?

*October 16, 2013*

**allgebra**

1/3(x+5=k) solve for x

*October 16, 2013*