# Posts by Max

Total # Posts: 686

**science**

Cobalt-60 has a 30 year half-life. How much of an 80 gram sample would remain after 60 years?

**Math**

Thevolume of a right circular cone is 5 litres.calculate the volumes of the two parts into which the cone is divided by a plane parallel to the base,one-third of the way down from the vertex to the base.

**Math**

At a professional sports game, T-shirts are shot out of a small cannon into the crowd. Suppose a T-shirt is shot from 1 meter off the ground with an initial upward velocity of 20 meters per second. The height of the path of the shirt, in meters, is approximated by the ...

**math**

Tickets to a museum cost $3 and $8 for adults. a group of four visitors to the museum spent a total of $22 on tickets. Write and solve a system of equations to represent this situation. Interpret the solution

**Tectonic Plates**

How is continental drift different from plate tectonics theory? -Mention 1 type of evidence for plate tectonics

**Maths**

It's in GP and not in AP

**Maths **

Sum of 4 terms in GP is 312 . Sum of 1st and 4th term is 252. Find the numbers.

**math**

y = x+6 y = -2x+3

**Physics**

.88kt

**History**

Is it B and C then? I'm not sure about D..

**History**

4. Which of the following represents elements of foreign policy? Select all that apply. declaring war <<< balancing the budget <<< recognizing diplomats engaging in interstate trade

**Physics**

The orbital period of the moon about the earth is approximately 27.3 days. given that the average earth-moon distance is 384,000 kilometers, predict the moon's speed using the expression for centripetal force and the gravitational force, setting them equal to each other.

**Riddle**

PLEASE HELP I DONT KNOW THE ANSWER! Riddle: You wake up in a room with only one door and no windows. On the ground is two specially made peices of string, a candle and a piece of paper. The string are at different lengths but both take exactly 60 minutes to burn. On the piece ...

**chemistry**

A mixture of NaOH and HCl is formed in a calorimeter. There is 50 mL of 2.078 Molar HCl and 51.7mL of 2.134 Molar NaOH. How would the heat capacity of the calorimeter change if you were to double the volume of NaOH? Justify your answer

**Chemistry**

A mixture of NaOH and HCl is formed in a calorimeter. There is 50 mL of 2.078 Molar HCl and 51.7mL of 2.134 Molar NaOH. How would the heat capacity of the calorimeter change if you were to double the volume of NaOH? Justify your answer

**Algebra 1**

What would be the answer to: 786 represented 32 less than 2 times a number.

**Math**

A pool is 8 meters by 5 meters wide. It has a walkway around the pool that is .8 meters wide. What is the area of the walkway?

**Physics**

Block A (Mass = 2.319 kg) and Block B (Mass = 1.870 kg) are attached by a massless string as shown in the diagram. Block A sits on a horizontal tabletop. There is friction between the surface and Block A. The string passes over (you guessed it) a frictionless, massless pulley...

**physics**

You walk for 6.44 km with at a constant velocity of 2.55 m/s due west, turn around, and then walk with an average velocity of 0.440 m/s due east. From your starting point to your destination, your overall average velocity is 1.33 m/s due west. During the trip, how far east did...

**English**

Is it "manmade", "man made", or "man-made"?

**Algebra 1**

7/2=x/48 2x=329 x=164.6 ~ 165 boys

**Math (urgent)**

Thanks. That was my problem, I couldn't find a right answer. Is there a problem with my work? x^2+y^2=25 y=x-1 x^2+(x-1)^2=25 (x-1)(x-1)=x^2-2x+1 x^2+x^2-2x+1=25 2x^2-2x+1=25 2x^2-2x-24 2(x^2-x-12) 2(x-4)(x+3) x-4) (x+3) x=4 x=-3 y=x-1 y=4-1 y=-3-1 y=3 y=-4 (4,3) (-3,-4)

**Math (urgent)**

the equation x^2+y^=25 describes a circle with center at the origin and radius 5. The line y=x-1 passes through the circle. Using the substitution method, find the points at which the circle and line intersect. a) (4,3) and (-4,-3) b) (3,4) and (-3,-4) c) (4,-3) and (-3,4) d) ...

**Math**

c^9*d^-7/c^14*d^-10

**profit and loss**

1100 divided by 100 is 11, so he gets $11 for one kg of rice. 11x20=220 So, he lost $220.

**math**

a six-faced die was thrown 28 times. the table shows the number that each possible score occurred. score 1 2 3 4 5 6 frequency 8 6 6 2 4 2 (a) After the 27th throw the median score was 2. what was the least possible score on the 28th throw? (b) The die was then thrown twice ...

**math**

How does the volume of a rectangular prism change if the width is reduced to 2004-06-01-04-00_files/i0280000.jpg of its original size, the height is reduced to 2004-06-01-04-00_files/i0280001.jpg of its original size, and the length is reduced to 2004-06-01-04-00_files/...

**Chemistry**

At constant pressure , a certain gas occupies 80cm3 at 0 degrees, what wil be its volumd at 10 degrees

**Math**

Determine u⋅v if u =5, v =3,and θ =π/3 ,where θ is the angle between u and v. A) 7.50 B) 12.99 C) 10.61 D) 10.25 E) 9.05

**Physics**

The answer is zero.

**math**

If one box contains 2apples nd 3 bananas... nd u r asked to calculate total num of bananas in 5 boxs....

**math (check answer)**

You want to know the number of students in your school that have a January birthday. You survey the students in your math class. Three students have a January birthday, and 32 do not. So, you conclude that about 8.6% of the students in your school have a January birthday. ...

**math**

Which sample is better for making a prediction? Why? Sample A: A random sample of 10 customers leaving a store Sample B: A random sample of 100 customers leaving a store i think maybe sample a would be more better for just a prediction because it's just 10 people. but then...

**Math**

John bought 8 apples and 10 oranges for a total of $41.60. An orange cost 70 cents less than an apple. What was the total cost of the apples?

**STAT**

Jet blue states the average air fare from Toronto to LA is $1455 with a SD of $123.56. What is the 99% confidence interval with a sample size of 64 airfares

**STATS**

The average number of applications of one gallon of car wax is 450; with a stdev of 23.9; if the bottom 5.2% of the wax containers is defective from the factory; what is the lowest amount of applications will pass and not be rejected.

**Hydrology**

I am having difficulty analyzing my lab data. I don't know whether to analyze a chart or use calculations to define the data. I am trying to use the Cooper-Jacob method. I also need to calculate transmissivity and storativity, but am having difficulty choosing the ...

**Math/Stats**

The average monthly attendance to the senior citizen bowling league is 67 with a stdev of 6.5. What is the probability that a randomly selected day will see between 72 and 78 visitors?

**math**

What is the circumference of the circle if the diameter is 63ft. use 3.14 for pie and round to the nearest hundredth.

**math**

Find the circumference of the circle. using 3.14 as pie and round to the nearest hundredth. The diameter is 14.9 in

**math**

find the area and circumference of the circle. Use 3.14 for pie and round to the nearest hundreth

**Physics**

A grain bucket conveyor (grain leg) raises soybeans from the ground level up to the peak of its height, h= 150 ft. A bushel of soybean weight, W=60 lb/bu. The bucket elevator can deliver, Q= 120 bu/min, to the top spout. The motor shaft power to drive the elevator is 40 hp. ...

**Math**

How many arrangements of all the letters in the word WINNIPEG can be created if the N's cannot be together?

**Math**

How many ways can Amanda, Basil, Charles, Denis, and Edna sit in a row if Basil and Edna must sit together?

**math**

What is the area of a regular 30-gon with a radius of 9mm? So far I know my interior angle is 6. That is all I can seem to figure out. Thanks!

**Physics**

A small 0.50 kg object moves on a frictionless horizontal table in a circular path of radius 1.0 m. the angular speed is 5.8 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of the circle. Someone under ...

**Math**

(5x^3y/20xy^5)^4 According to my teacher the answer is x^8/256y^16, but I don't understand how to get there.

**math**

A rectangular box of the dimensions 4 x 2 x 2 units is to be tied up with a ribbon lengthwise and breadthwise only once. For the knot, an additional 4 units of ribbon-length is required. What is the number of minimum units of ribbon-length required for this activity ?

**physics**

18

**geometry**

find the positive difference between to consecutive even integers such that 14 times the first is equal to 12 times the second

**chemistry**

potassium chlorate can be thermally decomposed to oxygen and potassium chloride. calculate the mass of potassium chlorate that must be decomposed by heat to produce 10.0L of oxygen gas at 150 degrees celsius and 150 kPa pressure

**Math**

What would I do to find the length?

**Math**

Can someone help or show me how to do this problem? On a scale drawing of a house plan the master bathroom is 1 1/2 inches wide and 2 5/8 inches long. If the scale of the drawing is 3/16 inches=1 foot, what are the actual dimensions of the bathroom?

**Math**

Ms. Sue can you explain or show me how to do this problem: Mr. Cafagna wants a fence around the rectangular field that measures 24 ft by 36 ft. How many yards of fencing does he need?

**Math**

How would one solve for x in the inequality x+b>c?

**Math**

How would one solve for x in the inequality x+b>c?

**Math**

Sarah can type 225 words in five minutes. She then typed 135 words in three minutes. If sarah types for 24 minutes, how many words did she type? A. What is the answer? (I answered 1080) B. Explain what the constant of variation is in the problem. Write an equation for the ...

**maths 3 advanced**

an experimental satelite is placed into a polar ellipical orbit above the earth. both its apogee and perigee are above the equator and the earths centre is the focus of the ellipical orbit. the earths radius is taken ar 6000km. the furthest point of the satellites orbit is ...

**math**

The length of a rectangle is 3 cm less than twice its width. If the length is decreased by 2 cm and the width is decreased by 1 cm, the perimeter will be 24 cm. find the dimensions of the original rectangle. Find X, 'find equation, and find answer plz.

**math 316**

A teacher wants to give 5 prizes to a class 27 students. I low many ways can he do this if all the prizes are the same and students can receive more that one prize? How many ways can he do this if all the prizes are different and students can receive more that one prize? How ...

**Math**

(2x^2)^(3/2)/(2^(1/2))*x^4

**oblique triangle trigonometry**

38776

**Biology**

Why does scenedesmus colony consist of 4,8 or 16 cells?

**Calculus**

My teacher wants me to use this formula for half life question C(t) = Ce^-kt but i used a different formula plz help. the question is: A radioactive isotope has a half life of 30 years. If we started off with 10 mg of this isotope 12 years ago: a) Find and expression for the ...

**math**

sorry I meant this here We'll start really simple, but the next problems will be more challenging. We can get a column of data from a dataframe by typing the name of the dataframe, then the $ symbol, then the name of the column with no spaces in between. First ask what the...

**math**

How many hours of total sleep are there for the first animal in the table? please help me

**Information Literacy**

no I didn't

**Information Literacy**

My resource are Google and textbooks

**Information Literacy**

can you please check this for me Why do we need information? What sources do you already use to obtain personal information? Information is a resource that has varied definitions according to the format, and media used to package or transfer it, as well as the discipline that ...

**Strategies for the independent learner**

huge thanks:)

**Strategies for the independent learner**

1.When you approach a text, you should A. survey it, using the technique called SQ3R. B. dive right in at the first page and read the assigned section. C. skip over words you don’t know. D. read only the boldface type. 7.You might want to review as you exercise because A...

**Strategies for the independent learner**

I appreciate that

**Strategies for the independent learner**

1.When you approach a text, you should A. survey it, using the technique called SQ3R. B. dive right in at the first page and read the assigned section. C. skip over words you don’t know. D. read only the boldface type. 2.The proctored exams for your degree courses are A. ...

**math**

there are 3 pizzas .each child will get 1/4 of a pizza.how many children will get pizza?

**Science**

thank you! this helped, i got 4/4

**Math**

Bob has designed a rectangular storage unit to hold large factory equipment. His scale model has dimensions 1 m by 2 m by 4 m. By what amount should he increase each dimension to produce an actual storage unit that is 9 times the volume of his scale model?

**chemistry**

Thanks this answer is absolutely correct

**alg. Compounding periods.**

60 months in 5 years?

**alg. Compounding periods.**

a loan requires that the 4% interest be compounded monthly for 5 years. find the number of compounding periods. 48 60 10 20 ________________________________________ Yolanda deposited $11,000 in a savings account that earns 3.5% onterest compounding daily. Find the compound ...

**social studies 8th**

The answer to 1 is d, checks and balances are measures that keep all branches of the government equal in power bu giving each branch to overturn some decisions.

**Chemistry**

Consider the titration of 30.0 mL of 0.100 M NH3 with 0.150 M HCl. calculate the pH after the following volumes of titrant have been added:(a) 0mL (b) 10.0 mL (c) 19.5 mL (d) 20.0 mL (e) 20.5 mL (f) 30 mL

**Calc**

Find the area in the first quadrant bounded by the curve y=(9-x)^1/2 and the x- and y-axis.

**Calc**

Find the area in the first quadrant bounded by the curve y=(9-x)^1/2 and the x- and y-axis.

**Further Maths**

uniform ladder of length 5m and weight 80 newtons stands on rough level ground and rests in equilibrium against a smooth horizontal rail which is fixed 4m vertically above the ground. If the inclination of the ladder to the vertical is x, where tan x is less than 3/4, find ...

**Math**

an airport mixes and additive into its jet fuel. The ration of fuel to additive needs to be kept the same. Complete the table below for amount of additive required for different amounts of fuel fuel (kg) 63 84 98 add 9(g) 30 42 48

**Math/ Compouded semiannually ?'s**

Jessica plans to purchase a car in one year at a cost of $30,000. How much should be invested in an account paying 10% compounded semiannually to have the funds needed. a. $27,210.90 b. $3,512.06 c. $24,793.50 d. $27,272.70 The Lee family plans to buy a new house in 2 years ...

**math**

35. Aaron wants to find an function that relates the price of a pizza to its size. He knows that this function need s to be non- linear. Which function below should he use? A. y=4piex B. y=pie(x-3) C. y=pie(x-3)^2 D. y=pie(x-3)^2+3(x+7)

**math**

21.Faith solves the equation 3(7x+4)=21x+4. How many solutions does she find? A. Infinitely many solutions B. 2 solutions C. 1 solution D. 0 solutions

**Algebra**

What is an expression that could be put in the blank so that the inequality would have the same solution set as shown in the graph? -4 < ______ < 16 The graph is is a numberline shaded between -4 and 6, with an open circle on -4 and open circle on 6.

**Math-please help**

One concert ticket is $5 and the other is $9. There are 500 seats. My expenses are estimated at $4000. Determine equations for income, profit, and expenses if all 500 seats are filled. Are my equations- expenses:y=400 income:4x+2500 profit:y=4x-1500

**Math!**

On the train we had 41 different kinds of cookies. 3 different flavors of cocoa, and 122 candies. How many treats did we have in all?

**Math**

Determine which of the following is true for the function X^3+5x^2-8x+3 f(x) has a relative minimum at x = 2/3. f(x) has a relative maximum at x = 2/3 f(x) has a zero at x = 2/3 Both A and C are true. <----- Both B and C are true.

**Math**

Isaac gets paid $400.00 per week plus a commission $10.00 for every item he sells. Write the equation that shows the relationship between the number of items he sells and his weekly income.

**Math**

How many 3 digit numbers can you find whose digits have a sum of 4. 112 211 103 301 310 013 031 202 220 022 400

**Math word problem**

Jeremy has 19 coins of 2 different values. the total value of the coins is $1.00. What are the coins? How many of each coin does he have?

**Physics**

A person pushes on a doorknob with a force of 5N. The direction of the force is at an angle of 20 degrees from the perpendicular to the surface of the door. The doorknob is located .800m from axis of the hinges of the door. The door begins to rotate with an angular ...

**physics**

A clock has a second hand whose tip rubs against the inside of the glass cover. If the frictional force between the glass cover and the tip of the second hand is 0.0010 N and the length of the hand is 6.5 cm, what is the minimum torque that must be applied to the second hand ...

**physics**

A 30-caliber rifle with a mass of 2.80 kg fires a 9.84- g bullet with a speed of 726 m/s with respect to the ground. What kinetic energy is released by the explosion of the gunpowder that fires the bullet?

**Math**

What is 3.9 x 4.67 equal to?

**Physics**

Two objects are moving in the xy-plane. No external forces are acting on the objects. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. Some time later, object A is...