# Sky

Popular questions and responses by Sky-
## calculus 1

A rock is dropped off the edge of a cliff its distance S (in feet) from the top of the cliff after T seconds is S(T) = 16t^2. Assumme the distance from the top of the water below is 96ft. When will the rock strike the water? T=16t^2 -96 96=16t^2 80=t^2 4

*asked on January 27, 2015* -
## Finance

You can deposit 10,000 into an account paying 9% annual interest either today or exactly 10 years from today. How much better off will you be at the end of 40 years if you decide to make the initial deposit today rather than 1o years from today?

*asked on September 16, 2011* -
## Science

Explain how sunlight is the primary source of energy for your own life? Please help!

*asked on September 22, 2014* -
## algebra 2

In the formula A(t) = A0ekt, A is the amount of radioactive material remaining from an initial amount A0 at a given time t, and k is a negative constant determined by the nature of the material. An artifact is discovered at a certain site. If it has 72% of

*asked on July 13, 2011* -
## Chemistry

For each reaction, write the chemical formulae of the oxidized reactants in the space provided. Write the chemical formulae of the reduced reactants in the space provided. 2AgNO3 + Cu -> 2Ag + Cu(NO3)2 Reduced:Cu->Cu+ +1e- Oxidized: Ag+ + 1e- -> Ag

*asked on January 8, 2015* -
## math

The perimeter of the rectangle below is 56 units. Find the length of side PQ.

*asked on February 7, 2016* -
## Chemistry

How many moles of C9H8O4 are in a 0.700 g tablet of aspirin? n^C9H8O4 =?????? How many molecules of C9H8O4 are in this tablet? N^C9H8O4 =????? How many carbon atoms are in the tablet? N^C =??????

*asked on March 2, 2020* -
## physical science

A horizontal force of 100 N is required to push a box across the floor at a constant velocity. a) Show that the net force acting on the box is zero. b) Show that the friction force that acts on the box is 100 N.

*asked on February 9, 2014* -
## Math

the product (2x^4y)(3x^5y^8) is equivalent to? a.5x^9y^9 b.6x^9y^8 c.6x^9y^9 d.5x^20y^8 e.6x^20y^8

*asked on January 18, 2013* -
## math - linear programming

A woman wishes to invest $12,000 in three of bonds: municipal bonds paying 7% interest per year, bank investment certificates paying 8%, and high-risk bonds paying 12%. For tax reasons she wants the amount invested in municipal bonds to be at least three

*asked on December 1, 2012* -
## physical science

Consider a 100-kg box of tools in location: A: on Earth B: on the Moon C: on Jupiter. Rank from greatest to the least the a) masses of the 100 kg box of tools and b) the weights of the 100-kg box of tools.

*asked on February 9, 2014* -
## calculus 1

A rock is dropped off the edge of the cliff and its distance S ( in feet ) from the top of the cliff after T seconds is S ( T ) = 16t^2. Assume the distance from the top ofthe cliff to the water below is 96ft Make a table of the average velocity and

*asked on January 27, 2015* -
## physical science

If you know that a 1-kg object weighs 10N, confirm that the acceleration of a 1-kg stone in free fall is 10 m/s2.

*asked on February 9, 2014* -
## Algebra

What is the radical expression that is equivalent 27 1/5 ?

*asked on March 26, 2020* -
## Math

The surface area of a cube is 384 square inches. What is the volume of the cube???? A. 8 cubic inces B. 16 cubic inches C. 256 cubic inches D. 512 cubic inches

*asked on April 22, 2011* -
## Calculus

lim (arccsinx)(cotx) x-->0+ How do I solve this limit using L'Hopital's rule?

*asked on May 13, 2020* -
## Chemistry

True or False: 1. Mass and weight are both independent of gravity. 2. Your weight on the moon is the same as your weight on the Earth. 3. Your mass on the moon is the same as your mass on the Earth. 4. Weigh and Mass are the same thing.

*asked on April 16, 2020* -
## Calculus

"A 9-foot wall stands 30 ft from the building. find the length of the shortest straight beam that will reach to the side of the building from the ground outside the wall". So I believe I need to start with the Pythagorean Theorem formula, but where do I

*asked on February 19, 2020* -
## math

a gumball machine contains orange yellow and purple gumballs the probability of getting an orange gumball is 3/4 the probability of getting a yellow gumball is 1/6 if there are 36 gumballs in the machine how many are purple?

*asked on February 13, 2017* -
## Science

Explain the role of a hypothesis in a scientific investigation.

*asked on September 22, 2014* -
## Science

In terms of energy, what is the difference between glucose and ATP?

*asked on September 22, 2014* -
## Science

The desert tortoise digs a burrow and hides in it during the day to stay cool, because of the extreme heat above ground. Which characteristic of life does this behavior best illustrate? A- response B- metabolism C- cellular organization D- growth and

*asked on September 19, 2014* -
## 5th grade math

I don't get it! /is 20 times 5/6 greater than or less than 20

*asked on April 15, 2013* -
## Math

If one hundredth is divided into ten equal parts, each part represents one what? 1- decimal, 2- decimal point, 3- fraction, or 4- thousandth.

*asked on February 14, 2013* -
## algebra 2

Find the inverse of the function. f(x) = e^-x + 5 f(x) = 10^x + 2

*asked on July 14, 2011* -
## algebra 2

what is the rule for the geometric sequence: 5000, 500, 50, 5?

*asked on April 30, 2011* -
## physics

Two blocks of mass m1 = 1.0 kg and m2 = 2.5 kg are connected by a massless string.M1 is on the surface and mass 2 is hanging on the surface. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.40.

*asked on December 4, 2010* -
## physics

Two blocks with mass m1 = 4.2 kg and m2 = 4.7 kg are connected by a massless string over a frictionless and massless pulley. The angle of the incline is equal to 27.5°. The kinetic coefficient of friction between m1 and the incline is 0.28. What is the

*asked on December 4, 2010* -
## Math

How do you combine 6 1's so that their sum is 123?

*asked on October 23, 2007* -
## Calculus

Hi, I need an opinion on this: My college is offering students an opportunity to take Calc III and IV at the same time summer quarter. Do you think it would be managable? Right now I'm doing pretty good in Calc II. I honestly want to get math over with so

*asked on May 27, 2020* -
## Chemistry

How many subatomic particles are in a Oxygen atom that has a -2 charge? protons: neutrons: electrons:

*asked on May 4, 2020* -
## Chemistry

What kind of metal is Bi? (metal, nonmetal, metalloid, transition metal, or lanthanide metal)

*asked on May 1, 2020* -
## Calculus II

Hi, not sure how to set this integral up for my Calculus II homework. "Given a graph that contains a parabola and a line, the equation of the parabola is x=(y-3)²/4 and the equation of the line is y=6-x. Find the area of the shaded region". Are we

*asked on April 21, 2020* -
## Math

How do I find the lateral area on a rectangular prism? I can't figure out which sides are the lateral sides since all of them are parallel

*asked on April 15, 2020* -
## Algebra

1. Simplify 26 ⋅ 26^8 2. Simplify (-5)^5 / (-5)^-6 3. Simplify 8^15 ÷ 8^-3

*asked on March 24, 2020* -
## Calculus

What is the difference between "area" and "net area" in calculus? I'm doing homework dealing with definite integrals and some problems ask for area and some ask for net area. Thank you for your help in advance. 😀

*asked on March 12, 2020* -
## Calculus 1

At 7:00 AM, the temperature was 30 degrees; 3 hours later it was 42 degrees. Assuming the temperature function is differentiable, what can be concluded from the Mean Value Theorem? Don't assume the temperature increased at a constant rate. I know that Mean

*asked on March 9, 2020* -
## Calculus

Find the function f where f ''(x)=8x³+5, f(1)=0 and f '(1)=8.

*asked on March 9, 2020* -
## Calculus

Hello, I am working on my calc 1 homework where we use L'Hôpital's rule to evaluate limits. When I try to evaluate this problem to find the indeterminate form, it becomes undefined so I know I need to rewrite it in a different way, I just don't know how.

*asked on February 21, 2020* -
## Calculus

What is generally the best way to approach optimization problems in Calculus 1? I'm having trouble even getting started on the basic ones like the fence ones or the rectangle ones. All I know is that they deal with minimizing and maximizing values. I would

*asked on February 18, 2020* -
## Social Studies

Drag the types of government to the correct nation. Words may be used once, more than once or not at all. parliamentary democracy autocracy presidential democracy monarchy Kenya South Africa Nigeria Equatorial Guinea

*asked on October 19, 2018* -
## Algebra

Kristen lives directly east of the park. The football field is directly south of the park. The library sits on the line formed between Kristen’s home and the football field at the exact point where an altitude to the right triangle formed by her home,

*asked on June 5, 2018* -
## science

How can volcanic eruptions change the surface of the earth? A. by lowering land levels several feet B. by creating new islands and land C. by creating large deposits of coal D. by decreasing the level of the ocean i think its B

*asked on April 10, 2018* -
## Educational technology

Which of the following is a narrative essay most like A. encyclopedia entry B. story C. fact sheet D. directions

*asked on November 17, 2017* -
## math

A cargo ship can carry containers weighing up to 50,000 tonnes. If it costs £1 million to rent out the entire space on this ship, how much will it cost if I want to rent out 3/5 of the entire space? How many tonnes of space do the firm have left to sell

*asked on March 18, 2017* -
## Math

My brother gets paid £70 a week. If he owes me 1/2 of his salary . If he pays me 1/7 of what he owes me how much money will he still take home?

*asked on March 18, 2017* -
## math

A cargo ship can carry containers weighing up to 50,000 tonnes. If it costs £1 million to rent out the entire space on this ship, how much will it cost if I want to rent out 3/5 of the entire space? How many tonnes of space do the firm have left to sell

*asked on March 18, 2017* -
## Math

The oldest man in the world is 110 years old . If his younger brother is 9/10 of his age how old is his younger brother?

*asked on March 17, 2017* -
## Economics

What is the differentiate between the exogenous and endogenous approach.

*asked on February 4, 2017* -
## Math

Describe each of the three methods you can use to find the area of a rectangle.

*asked on January 3, 2017* -
## science

1. If person weighs 176 lbs on earth what is his or her mass on mars where the force of gravity is 37% of that on earth. With Complete solution

*asked on September 25, 2016* -
## math

how many 1/6 pound hamburgers can be made with 8 pounds of meat

*asked on December 7, 2015* -
## Calculus

Problem 5. Protein Concentration in Cells Consider a growing bacterial cell that is producing a protein involved in binary fission. Suppose that, at a particular point in time, a bacterial cell has a volume of 1000 μm3 (microns cubed) and is growing at a

*asked on November 3, 2015* -
## Geometry

Plane R contains points ,M,and Y. Plane Z intersects with plane R at SM, AY intersects plane R at point Y. . Point A is not in plane Z or plane R. MY forms a right angle with MS. A. What is measure of < SMY? B. Name three points that are noncollinear. C.

*asked on October 20, 2015* -
## Maths

Tiffany makes $4000 a month plus some money by commission rates. She gets 4% of everything she sells. If Tiffany sold $40000 worth of items this month, what is her salary for the month?

*asked on September 22, 2015* -
## math

Jay has 6,200 beads. He is making bracelets with 9 beads each. How many bracelets can he make? How many beads will be left. I know the answer to the first question, but i don't know the second.

*asked on March 5, 2015* -
## Biology

How do you calculate the magnification on a microscope? Please help, I do not have any multiple choice to go by, I have to write a response!

*asked on September 18, 2014* -
## math

6/16 of children have freckles. of those 1/12 have red hair. how many have red hair and freckles?

*asked on April 3, 2014* -
## Chemistry

Solutions of NiSO4(aq), Al2 (SO4)3 (aq), CoSO4 , and SnSO4 (aq) are in bottles labelled A, B, C, and D. a) Design an experiment to identify which ionicsulfate solution is in which bottle. Give a list of equipment and chemicals required. Describe a

*asked on February 18, 2014* -
## math

you estimate that the trip to pick up your friends, go to the restaurant and movies, and return home will be about 75 miles. your parents car gets 22.5 miles to the gallon around town. how many gallons of gas will you need to buy?

*asked on December 2, 2013* -
## Algebra 2

solve this equation x+2y+2z=6, -2x+4y+6z=-3, x+3y+z=6

*asked on November 24, 2013* -
## math

What fraction is greater using approximation 13/30 or25/41

*asked on November 19, 2013* -
## math

What fraction is greater using approximation 13/30 or25/41

*asked on November 19, 2013* -
## Math

The perimeter of a triangle Abc is 28 inches . Side Ab is 6 inches long and side BC is 8 inches long. find the length of side AC. Thank you.

*asked on November 14, 2013* -
## math

1-sin^2x/cosx = sin^2x/2sinx Please help me figure out this one, can you show all the steps, I am really confused. Your help is very much appreciated. Thanks

*asked on November 5, 2013* -
## common sense question, i just dont know how to ans

Why must the test tubes be thoroughly cleaned and dried when one part of the procedure is completed before starting the next part of the procedure ? Please help me with this, thankyou so much!

*asked on October 27, 2013* -
## Chemistry grd 12

for the below questions the food samples were onion juice, cornflakes, egg, milk, salad dressing and instant oatmeal. 1) Why are you required to wear safety eye wear and protective clothing while conducting an investigation of testing food samples for

*asked on October 27, 2013* -
## Grade 12 University Chemistry

Hi, i have a project for chemistry, i have to choose a scientist (i chose Micheal Smith) his career is biochemistry and i have to create a career related to biochemistry.. Question: After finding the famous chemist and then using their field of chemistry,

*asked on September 28, 2013* -
## English on different cultures

Why do many people across the world watch korean dramas instead of their own culture dramas?

*asked on September 28, 2013* -
## grd 12 U chemistry

Hi, i have a project for chemistry, i have to choose a scientist (i chose Micheal Smith) his career is biochemistry and i have to create a career related to biochemistry.. Question: After finding the famous chemist and then using their field of chemistry,

*asked on September 28, 2013* -
## physics

An MRT tunnel is 418m long. Calculate the time it will take the 108-m long train , travelling at 72km/h to pass completely through the tunnel, leaving your answer in seconds

*asked on March 31, 2013* -
## Chemistry

My assignment sheet said to plot a KE distribution diagram where 10% of the molecules meet or exceed the Ea. I know the Ea and enthalpy change. But nothing else so does this mean the diagram is just a estimation of what it would look like.Or am i doing

*asked on December 14, 2012* -
## 5th Grade math

To: bobpursley - how do you teach a 5th grader how to figure out the answer?

*asked on August 31, 2012* -
## Math

You can only use the digits 0-9. I need an odd number that is a multiple of five with no repeated digits. Half the digits are odd and the other half is even. The largest digit in the number is in the tens place (but it is not the largest digit). The digit

*asked on August 31, 2012* -
## math

find the points on the given curve at which the curvature is a maximum? a)y=e^-x b)y=lnX

*asked on March 7, 2012* -
## math

state the following property: 5 (3+20) = 15 + 100

*asked on October 9, 2011* -
## algebra 2

log 5 ã5 log7 (1/49)

*asked on July 15, 2011* -
## algebra 2

Solve the equation. If necessary, round to thousandths. 3^(2x + 1) = 27

*asked on July 13, 2011* -
## algebra 2

Solve the equation. Give an exact solution. ln(3x - 2) = ln 2 - ln(x - 1)

*asked on July 13, 2011* -
## Math probabilty

An amusement park, Dino World, considering adding some new attractions, conducted a study over several typical days and found that, of 10,000 families entering the park, 1020 brought just one child (defined as younger than age 12), 3370 brought two

*asked on July 10, 2011* -
## Math

paint color is made using 4 drops of red and 5 drops of blue for each 5 gallons of paint. How many gallons of paint are being colored when 45 drops of color are used??

*asked on April 22, 2011* -
## math/algebra

If n=4 what does 3x+5=

*asked on February 24, 2011* -
## math/algebra

8*2 divided by 4=

*asked on February 24, 2011* -
## math/algebra

9(3+4)=

*asked on February 24, 2011* -
## math/algebra

9(3)+4=

*asked on February 24, 2011* -
## math/algebra

5-(2+3)=

*asked on February 24, 2011* -
## math/algebra

5-2+3=

*asked on February 24, 2011* -
## algerbra/math

Leo has 1/5 of the amount Don has. Write an algebraic expression that shows how many games Leo has

*asked on February 23, 2011* -
## algerbra/math

Don's little sister Nadia has half the amount of games Don has. Write an algebraic expression that shows how many games Nadia has.

*asked on February 23, 2011* -
## algerbra/math

Don has three times as many games as Carlos. Write an algebraic expression that shows how many games Don has

*asked on February 23, 2011* -
## algerbra/math

Jolene has twice as many games as Juan. Write an algebraic expression that shows how many games Jolene has.

*asked on February 23, 2011* -
## algerbra/math

His brother Carlos has 10 more games than Juan has. Write an algebraic expression the shows how many more games Carlos has than Juan

*asked on February 23, 2011* -
## AP Chem

What mass of K2CO3 is required to clean up a spill of 282 ml of 1.05 M HCl if HCl(aq) reacts with K2CO3 according to 2HCl(aq) + K2CO3(aq) → 2KCl(aq) + CO2(g) + H2O(l)?

*asked on February 9, 2011* -
## Chemistry 101

How many milliliters of a 0.14 M NaOH solution contain 0.158 mol of NaOH?

*asked on February 3, 2011* -
## statistics

If you buy one ticket in the Provincial Lottery, then the probability you will win a prize is 0.11 what is the probability that you would first win when you purchase the second ticket?

*asked on January 6, 2011* -
## physics

One of two 207.0 kg crates is dragged across the floor at a constant speed with a horizontal force of 197.0 N. How much force would it take to drag them both across the floor if they are tied together one behind the other? How much force would it take to

*asked on December 4, 2010* -
## math

In the diagram show, every point in the plane with integer coordinates is labeled with a positive integer by a “rectangular spiral” process that begins at the origin and works its way out. What are the coordinates of the point labeled 1009?

*asked on November 14, 2010* -
## English

ship is to trip as shout is to ?__________

*asked on April 5, 2010* -
## Math distance rate 8th grade test tmr!

Two planes left Seattle at the same time, both traveling due east. One had the rate of 185 mi/h and the other had a rate of 225 mi/hr. After how many hours were they 220 miles apart?

*asked on March 24, 2010* -
## distance problems

two planes left Seattle at the same time, both traveling due east. One had the rate of 185 mi/h and the other had a rate of 225 mi/hr. After how many hours were they 220 miles apart?

*asked on March 24, 2010*

## Pages

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