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Posts by Cam

Total # Posts: 168

pre-calc
A statement Sn about the positive integers is given. Write statements S1, S2, and S3, and show that each of these statements is true. Show your work. Sn:   2 is a factor of n^2 + 7n

Math
The rabbit population in a forest area grows at the rate of 7% monthly. If there are 180 rabbits in September, find how many rabbits (rounded to the nearest whole number) should be expected by next September. Use . A. 402 B. 408 C. 428 D. 415 I got 402, is this correct?

Math
An investment is worth $3518 in 1995. By 2000 it has grown to $5553. Let y be the value of the investment in the year x, where x = 0 represents 1995. Write a linear equation that models the value of the investment in the year x. A. y = -407x + 7588 B. y =1/407 x + 3518 C. y...

westdale middle
the last years of reconstruction were violence and voter intimidation. can someone please help

spanish
How do you say an uncle in spanish? A:uno tio B:unos tios C:un tio** How do you say some female cousins in spanish? A:Unas primas B:Una prima C:Unos primos**

Math
Recipe needs to make exactly 10 cups. 5 ingredients. Using 1/3 cups and/or 1/4 cups only. Please help.

social studdies
Is it b?

social studdies
Which event within a state will most likely require the involvement of the federal government A.A corporation is created B.The state constitution is amended C.A boundary with a nearby state is disputed D. The rules for obtaining a drivers licence change

Physics
So p=m*Vi + (a*t) 85*1+2t=65*0+3t 85+2t=3t 85=t? Which is incorrect obviously. I know from other failed methods that the answer is ~3.7seconds. What am i doing wrong?

Physics
How do I figure out how long it takes two runners to have the same momentum if I am given a, m, and Vi for both runners? Runner A= 85kg, 2ms-2, Vi=1ms-1 Runner B= 65kg, 3ms-2, Vi=0ms-2 I don't want an answer, just which equations to use or a hint.

Math
Or is it B?

Math
Which quadratic rule represents the data in the table? X : -1 | 0 | 1 | 2 | 3 Y: 4 | 5 | 4 | 1 | -4 Y = -2x^2 + 5 Y = -x^2 + 5 Y = -x^2 - 5 Y = x^2 + 5 My answer is Y = -x^2 - 5

Math
What are the mean, median mode and range of the data we given the altitude of lakes in feet? -9,-36,-23,-8,17,-52,27,-36 Mean: -25 Median: -26 mode: -44 range: 36 Mean: -25 Median: -:-36 mode: -36 Range: 44 Mean: -26 Median: -25 Mode: -36 range: 44 Mean: -26 Median: -44 Mode...

Science
Why do scientists study images made with parts of the electromagnetic spectrum other than visible light? A)These images are the only way to observe galaxies beyond our own. B)These images reveal information that visible light does not show. C)These images show important data ...

Science
Me too but i'm not sure....

Algebra 2
Mrs. Jones algebra 2 class scored very well on yesterday's quiz. With one exception, everyone received an A. Within how many standard deviations from the mean do all the quiz grades fall ? Ó =3.1 95, 92,94,88,96,99,91,93,94,97,95,97

ss
A B C A 100 :)

Math
1.Find the length of the hypotenuse of a right triangle with the legs of 9cm and 12cm A.8 B.21 C.15*** D.225 2.The length of a hypotenuse of a right triangle is 13cm. The length of one leg is 5cm. Find the length of the other leg. A.14 B.144 C.8 D.12*** 3.Which of the ...

math
How do i divide 6 by 2/7

math
idk

Calculus
How can I solve this using Log differentiation? I'm not sure how to even start it. y=(cos(x)(x^2+9)^(2/3)/(sqr(x^3+2))

Delaware State University
SO3, Kr, Cl2

Social Studies
What two ancient civilizations had the most similar religious beliefs/ A. Greek and Persian B. Roman and Greek C. Chinese and Roman D. Persian and Chinese I pick B is this correct

Math
Would it be 6 red marbles 2 blue marbles.

Math
If 50 books is $86.45 for each Books and 150 books is $80.95 for each book what is the cost for 60 books?

SOCIAL STUDIES
C duhhh

science
Some hypothetical metal has the simple cubic crystal structure. If its atomic weight is 70.4 g/mol and the atomic radius is 0.126 nm, compute its density in g/cc.

math
Jackson have a piece of wood that is 6 feet long. He is cutting it into pieces that are 1/3 of a foot. How many pieces of wood will he have after he cuts it?

Math
sin A = 1/2 A = 30 degrees sin is opposite over hypotenuse thus, BC/AC BC = 8 (given) thus 1/2 = 8/AC AC = 16 cos A is cos 30degrees so cos A = (sqrt(3)) / 2 cos is always adjacent over hypotenuse thus, AB/AC because AC = 16 sqrt3 /2 = AB/16 AB = 8 sqrt3

Differential Equations
(a) Let S be the set of solutions y(t) to the differential equation dy/dt = -y for t> 0. With addition and scalar multiplication of elements defined in the usual way, is S a vector space? (b)Let T be the set of solution y(t) to the differential equation dy/dt = 1 - y for t...

math
Jenny wanted to solve the quadratic equation x2 - 11x +18 = 0 by factoring. Which of the following equations would lead her to solve the given equation?

Math DE
Find the general solution of the differential equation dy/dx-4y= -5y^2

Geometry
rhombus is a rectangle is c and square is b

geography
1. B 2. D 3. D 4. D 5. C 6. A 7. C 8. D 9. C

Civics- Help PLEASE
THIS JUST MESSED ME UP I HOPE U GO TO HELL

Math
Expand (1+y+ky^2)^8 until y^3

physics
okay, I got it thanks !

physics
6.67e-11

Damon
the mass of the moon is M=7.35e22 and the radius= 1.738 e6 I used the formula 1/2m(2/5vi)^2 - GMm/h+R= 1/2vi^2-GMm/R Where little m cancels out and solved for h. But my answer and the answer you just gave me was marked wrong. So you have any other suggestions?

physics
A projectile is launched vertically from the surface of the Moon with an initial speed of 1210 m/s. At what altitude is the projectile's speed two-fifths its initial value?

Chemistry
Balance the following redox (oxidation-reduction) reaction under basic conditions. (Include states-of-matter under the given conditions in your answer. Use the lowest possible whole number coefficients.) CrO42−(aq) + S2O32−(aq) → Cr3+(aq) + SO42−(aq)

physics
Same here Heather, same here.

Physics
0.50

Physics
A single mass (m1 = 3.2 kg) hangs from a spring in a motionless elevator. The spring constant is k = 253 N/m. 1) What is the distance the spring is stretched from its unstretched length? This first answer is equal to 12.4 cm but I am having trouble on the second question... 2)...

Physics
You are on an airplane traveling 30° south of due west at 130 m/s with respect to the air. The air is moving with a speed 30 m/s with respect to the ground due north. One question.. 2) What is the heading of the plane with respect to the ground? (Let 0° represent due ...

math 6th grade
the bridge span is 360 meters long. the bridge is 30 meters shorter than the main span. write and solve an equation to the the length of the main span

math
i need the equation

math
the length of the blue ribbon is two-thirds of the length of the red ribbon. writh an equation to find the length r of the red ribbon

Physics
A red ball is thrown down with an initial speed of 1.2 m/s from a height of 25 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 22.9 m/s, from a height of 0.8 meters above the ground. The force of ...

Physics
Hey bobpursley! ITS 3.09!! YAYY thanks lot!

Physics
A blue ball is thrown upward with an initial speed of 19.6 m/s, from a height of 0.5 meters above the ground. 2.4 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 7.9 m/s from a height of 22.1 meters above the ground. The force of ...

math
111

math
cot^2(x)-1/1+cot^2(x)

Trigonometry
(1/(cscx+1))-(1/(cscx-1))

Trigonometry
simplify: tanx/secx+1

Trig
sin^2(34)+sin^2(48)+sin^2(56)+sin^2(42)

Trig
sqrt(100+(10cotx)^2)

math 2nd grade
24-16=8

Statistics
A credit manager has chosen a sample of size 2,164 to estimate the mean balance of credit accounts to within $0.50. A pilot study of 50 accounts had a mean of $1,219 and a variance of 100. The level of confidence of the interval is: 90% 95% 98% 99%

Hypothesis Test
that isn't one of the choices :/

Physics
1.0

Statistics
Thank you so much !

Statistics
$9,531 to $11,269 $9,347 to $11,453 $10,028 to $10,772 $9,414 to $11,386 Are my multiple choice

Statistics
That's what I originally did but it's not one of the correct answers

Statistics
A random sample of 50 students chosen from an elementary school with 400 students was found to have a mean allowance of $26 per week with a standard deviation of $8. Obtain a 98% confidence interval for the total amount of allowance money given to students in this school per ...

Stats
A company with two plants producing the same product, but with two slightly different manufacturing processes, conducted a sample study at each of the two plants with the following results: The sample statistics from the first group are: n = 40, x-bar = 18, s = 4.2. The sample...

chem
C2H20

Physics
A jetliner, travelling northward, is landing with a speed of 79 m/s. Once the jet touches down, it has 710 m of runway in which to reduce its speed to 7.4 m/s. Compute the the average accelaration (magnitude and direction) of the plane during landing.

Chemistry answer check
907

Instructional materials, their preparation and use
Which of the following would you use to sort through slides for a slide or injection?

stats
Usin7) An employer polled its employers to see if they agree with the proposed new store hours and whether or not their present shift made a difference in their answers. The customers answered 1 for agree, 2 for don't know, and 3 for disagree. Nine first shift employees ...

Statistics
For questions 1-5, write the null and alternative hypothesis. 1. Does the water temperature have an effect on the number of people in the pool? 2. Does the weather have an effect on the number of people at the beach? 3. A fitness center is running a discounted membership fee. ...

Statistics
1. A study of 40 people found that they could do on the average15 pull ups with a standard deviation of .6. Find the 99% confidence interval for the mean of the population. 2. A study of 50 pizza delivery workers found that they could make 6 deliveries per hour with a standard...

statistics
2. Why is it important to know the mean and standard deviation for a data set when applying the empirical rule? 3. If we are focused on 68% of the normal distribution, what percentage of the distribution is left in the upper tail only? 4. What value separates the 50% of the ...

statistics
A study found that citizens spend on average $1950 per year on groceries with a standard deviation of $100. Assume that the variable is normally distributed. 5. Identify the population mean. 6. Identify the population standard deviation. 7. Find the probability that a sample ...

statistics
A specific study found that the average number of doctor visits per year for people over 55 is 8 with a standard deviation of 2. Assume that the variable is normally distributed. 1. Identify the population mean. 2. Identify the population standard deviation. 3. Suppose a ...

Teaching techniques
Which learning technique is frequently used in the expository model of teaching?

Calculus
Find the second derivative of the function f(x)= t^2e^(-2t)

Calculus
Write the expression as the logarithm of a single quantity. ln 2 + 1/2 ln(x +1)-2 ln(1+ x^(1/2))

Calculus
Determine the function is concave upward and where it is concave downward f(x)= x / (x+1)

Calculus
Find the absolute maximum value and the absolute minimum value, f(x)= (x +1 )/ (x-1) on [2, 4]

Calculus
Find the absolute maximum value and the absolute minimum value, g(x)=1/8 x^2 - 4 x^(1/2) on [0, 9]

College Math
I need help solving these problems by using the substitution problem 2x-3y=16 5x+2y=21

Chemistry
Calculate the pH of the 0.20 M NH3/0.25 M NH4Cl buffer. I calculated the pH to be 9.15 What is the pH of the buffer after the addition of 10.0 mL of 0.10 M HCl to 72.5 mL of the buffer?

Calculus
Find relative maxima and minima of g(x)= 2x^2+ 4000/x +10

calculus
Let f(x)=ax^3+6x^2+bx+4. Determine the constants a and b so that f has a relative minimu at x=-1 and a relative maximumat x=2.

6th math
a factory can produce 45 containers of yogurt in t minutes, 950 grams of fruit are used for every 25 containers of yogurt b) find in terms of t the time taken by the factory to produce 100 containers of yogurt c) if t=6 find the amount of fruit used in producing containers of ...

physical science
You are at a concert and you are located 91.2-m from the speakers. The frequency belting from the speakers are 291-Hz, if it takes 0.230-sec for the sound to reach your location what is the sounds wavelength?

physical science
You are at a concert and you are located 95.9-m from the speakers. The frequency belting from the speakers are 257-Hz, if it takes 0.503-sec for the sound to reach your location what is the sounds wavelength?

physical science
You are at a concert and you are located 97.5-m from the speakers. The frequency belting from the speakers are 216-Hz, if it takes 0.181-sec for the sound to reach your location what is the speed of sound in this facility?

Math
If Bob hikes 5/8 of a mile in 1/3 of an hour. How fast is going in miles per hour?

Biology
what two mutations cause a shift or after the sequence after the mutation?

Biology
do mutations occur in DNA or RNA? Explain

Biology
what is the difference between a gene mutation and a chromosomal mutation?

physics
)A block with mass m = 11.3 kg slides down an inclined plane of slope angle 43.4 ° with a constant velocity. It is then projected up the same plane with an initial speed 1.45 m/s. How far up the incline will the block move before coming to rest?

physics
)A block with mass m = 11.3 kg slides down an inclined plane of slope angle 43.4 ° with a constant velocity. It is then projected up the same plane with an initial speed 1.45 m/s. How far up the incline will the block move before coming to rest?

English
On an invitation, it says "Come celebrate at my pad!" and has a picture of a lilly pad on it. Is this an example of a pun?

math
dave has a rabbit, a ferret,a gerbil and a turtle. He feeds them in a different order each day. In how many different orders can dave feed his pets. Make an organized list to solve each problem. Write each answer in a complete sentence show work please

math
the end points of a line segment are A (-7, -1) and B (5,5) determine the equation of right bisector of AB show that the origin 0,0 lies on the right bisector of AB

Math
How do you find the high and low estimate for 29 x 73 and 615 X 25?

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