Posts by Chris

Total # Posts: 2,765

Chemistry
How many mL of 1.2 M HCl is needed to react with 5.8 g of Al(OH)3

science
A feather is dropped on the moon from a height of 1.40meters.The acceleration of gravity on the moon is 1.67m/s^2.Determine the time for the feather to fall to the surface of the moon.

Math
Kathy is y years old Find her age,if 1/2 of wat she was 3 years ago is equal to 1/3 of what she will be in 4 years time

Assessment
Authentic and performance assessments strive for greater realism and complexity of tasks under the premise that real-life problems can often be solved ______________.

MATH HELP
its not b

Math
If Sam has 6 apples and Linda takes 12 apples how many apples does Jesica have?

Trigonometric
A woman standing on a hill sees a flagpole that she knows is 55 ft tall. The angle of depression to the bottom of the pole is 14°, and the angle of elevation to the top of the pole is 18°. Find her distance x from the pole.

Physics
A bat moving at 5 meters per second is chasing a flying insect, if the bat emits a 40 khz chirp and receives back an echo at 40.4 khz what is the speed of the insect and will the bat be able to catch the insect?

Math
I got A and B but i need C Suppose a ship is sailing at a rate of 35km/h parellel to a straight shoreline. The ship is 10km from shore when it passes a lighthouse at 11am. a) Let k be the distance between the lighthouse and the ship. Let d be the distance from the ship has ...

Math
I got A and B but i need C Suppose a ship is sailing at a rate of 35km/h parellel to a straight shoreline. The ship is 10km from shore when it passes a lighthouse at 11am. Question 6 a) Let k be the distance between the lighthouse and the ship. Let d be the distance from the ...

COMP1
Heading back to the states but on edge since he survived the tsunami FRAGMENT OR NO

Math
wait I'm confused with c what do i do or put

Math
So b) i would just say d=35km *t

Math
Thank you guys both of you!

Math
Someone answer all of this clearly, I don't get it at all. Suppose a ship is sailing at a rate of 35km/h parellel to a straight shoreline. The ship is 10km from shore when it passes a lighthouse at 11am. Question 6 options: a) Let k be the distance between the lighthouse ...

Science
A tank which is raised above the ground level, has a hole in its flat base, through which water flows and falls to the ground below. If the depth of water in the tank is 0.5 m and the tank base is 0.7 m above the ground, what is the fluid velocity (u) (m/s) just before it ...

Math
Someone answer all of this clearly, I don't get it at all. Suppose a ship is sailing at a rate of 35km/h parellel to a straight shoreline. The ship is 10km from shore when it passes a lighthouse at 11am. Question 6 options: a) Let k be the distance between the lighthouse ...

Math
whats the composite function of these two equations and its domain and range f(x)=2^x and g(x)=3-x

Math

Math
Can you explain or show me how to do this problem: Mary bought 8 1/2 yards of ribbon. How many inches did she buy?

chemistry
How much energy is absorbed to change 7.25 g of ice at -3 C to 25.5C?

Math
Edit for g(x) i mean g(x)=3-x

Math

Math
What is the composite function of 3x^2-5x+6 and x^2+3x and what is its domain and range

Math
Help me for this question on composite functions Does the composition of functions display the commutative property? Give an example of each case to illustrate your answer.

Equations and Inequalities Unit Test
are these right one or what

Math
If a1,a2,…,a100 are real numbers such that a1=1 and a100=.01, evaluate ∑(j=1 to 99) (aj−aj+1).

Math
Finding the composite function

Math
Question 1 A) f(x)=2^x and g(x)=3−x I got 3x^2+12 don't know if im right B) i need help for this f(x)=sinx and g(x)=x

Math
We need help putting these fractions from greatest to least 2/3 3/4 1/2 8/10

us history
Thank you!!

Math
When I convert 400 quarts to 4000 Cups would the answer be 400 qt= 1600 cups and 4000 C < 400 qt?

Math
is the answer 4000 cups < 400 quarts because 400 quarts= 1600 Cups? Is it right?

Math
i have this so far 8=-8cos(pi/30(0-y))+8

Math
the value

Math
how can i solve for y value with this equation f(x)=-8cos(pi/30(x-y))+8

Math
Change the cos function into a sin function d(t)= -8cos (pi(t)/30)+8

Math
i mean the y value,change it to sin function

Math
Solve for d D(t)= -8cos (pi(t)/30)+8

Math
solve for d i mean

Math
Error I mean for d

Math
how do i solve for t and turn this equation into a sin function d(t)=-8cos(pi(t)/30)+8

Math
For each of the functions below, state the domain and range, the restrictions, the intervals of increasing and decreasing, the roots, y-intercepts, and vertices. a) f(x)=2x(^2)−8 b) f(x)=+√x-2

English 3
A verb must agree with its subject in number

Math Exponetial Function Problem Question?
Thank you so much damon!!

Math Exponetial Function Problem Question?
Im confused if im doing this right Last week there was an earthquake that measured as a magnitude of 3.2 on the Richter scale. Today you hear on the radio that there was a second earthquake that was 27 times more intense than the first. What was the magnitude of the second ...

Math
*86.4 i mean

Math
Are you sure this is right,someone told me since to get magmitude of the second i have to multiply 27 by first earthquake which is 3.2 27(3.2)=84 Im confused

Math
Ok,thanks!

Math
solve for x using logarithms round your answer to four decimal places. a)2^2x+3=80

Math
So i guess my answer is acceptable right :)

Math
For a)

Math
Okay i was wondering because some people told me the answer is log(f(x))=2xlog(3)

Math
I don't if I'm right for these two questions i just need a check if I'm right,if I'm wrong please show me how to get that answer. Rewrite the following exponential functions as logarithmic functions a)f(x)=9^x ans:f(x) Log^-1(xlog(9)) b)f(x)=(7/8)^x ans:log^-1(...

Math Logarithmic Question
Solve for all possible values of x within the domain of the following logarithmic expressions. a)logx+log2=log7−log3

Math
Logrithmetic Problem question Last week there was an earthquake that measured as a magnitude of 3.2 on the Richter scale. Today you hear on the radio that there was a second earthquake that was 27 times more intense than the first. What was the magnitude of the second ...

Math
Exponetial Functions In the following exponential relations, solve for x using logarithms. Round your answers to 4 decimal places. a) 5^3x=65 b) 2^2x+3=80

Math
error i mean f(x)=(2)^x-7

Math
For the following function, state: i. the domain and range ii. the y-intercept, and iii. the horizontal asymptote f(x)=(2)x−7

Math
Describe the Transformations For Each Function a)f(x)=3sin(1/2x+pi/2)+1 b)-1/3cos(2x-pi)-2

Math
The temperature, throughout the year, in a particular town can be graphed using trigonometric functions. On July 24th, the hottest day of the year, the temperature is 27 degrees Celsius. On Jan. 24th, the coldest day of the year, the temperature is -11 degrees Celsius. ...

Trignometric Functions
The temperature, throughout the year, in a particular town can be graphed using trigonometric functions. On July 24th, the hottest day of the year, the temperature is 27 degrees Celsius. On Jan. 24th, the coldest day of the year, the temperature is -11 degrees Celsius. ...

math
You put \$1,000 into a savings account today that offers a 5% APR with semi-annual compounding (i.e., two times per year).

math
What is the effective annual rate on the loan? (I.e., what is the interest rate once we take into account compounding?)

math
\$400,000 for 30-years at a fixed APR of 3.87%. The loan payments are monthly and interest is compounded monthly.

Math
For a stat class the mean of the midterm is 75 with a standard deviation of 7. What percentage of students scored between 67 and 83

Marketing
We want to advertise a service that we can use the phrase "Save 40! Either % or \$ - You Choose. What would the retail amount of that service be if the amount of savings in dollars were 40 and the percent savings were 40? Assume zero cost. List price and sell price would ...

physics
A golf ball is dropped from rest from a height of 8.30 m. It hits the pavement, then bounces back up, rising just 5.00 m before falling back down again. A boy then catches the ball when it is 1.10 m above the pavement. Ignoring air resistance, calculate the total amount of ...

physics
A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 90.3 m/s2 for 1.75 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground) ...

physics
A golfer rides in a golf cart at an average speed of 3.93 m/s for 43.3 s. She then gets out of the cart and starts walking at an average speed of 1.13 m/s. For how long (in seconds) must she walk if her average speed for the entire trip, riding and walking, is 1.99 m/s?

physics
A projectile is launched from and returns to ground level, as the figure shows. There is no air resistance. The horizontal range of the projectile is measured to be R= 166 m, and the horizontal component of the launch velocity is v0x = 26.0 m/s. Find the vertical component v0y...

physics
Traveling at a speed of 16.5 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.590. What is the speed of the automobile after 1.35 s have elapsed? Ignore the effects of...

math
I can't figure out the answer

Mortgage lenders base the mortgage interest rate they offer you on your credit rating. This makes it financially critical to maintain a credit score of 700 or higher. How much more interest would you pay on a \$193,000 home if you put 20% down and financed the remaining with a ...

math
if 75 widgets are processed in 3.5 hours by 1 person, how long will it take to process 1650 widgets using 9 people.

algebra
No. 2 alyssa has some coins in her purse consisting of pennies, nickels and dimes. She has 2 more nickels than dimes and thrice as many pennies as nickels. If the total is 0.52 dollars how many coins of each kind does she have.

Math
△ = Triangle If △ABC is similar to △DEF, and angle A is 62 degrees, angle B is 13 degrees, find the measure of angle F. (Also I don't want just the answer, I also want to know how to actually do it so I will know how to do this.)

Physics 1
A car manufacturer claims that you can drive its new vehicle across a hill with a 47 degree slope before the vehicle starts to tip. If the vehicle is 2.0 meter wide, how high is its center of gravity?

Triganometry
To measure a stone face carved on the side of a mountain, two sightings 407 feet from the base of the mountain are taken. If the angle of elevation to the bottom of the face is 36 degrees and the angle of elevation to the top of the face is 67 degrees, what is the height of ...

MATH HELP
What types of numbers are these (Natural, Whole, Integer, Rational, Irrational or Real) 1. 0.020220222 2. 4.4/1.1 3. ãã169 4. -3.222 5. 1.3131313... 6. 5.2/.13 7. 5.1011011101110... 8. 6pi/5pi 9. 45pi/9 10. ã-9 Thanks for the help

Math
A bag contains 9 red marbles, 8 white marbles, and 6 blue marbles. You draw 4 marbles out at random, without replacement. What is the probability that all the marbles are red? What is the probability that exactly two of the marbles are red? The probability that exactly two of ...

Math
A bag contains 9 red marbles, 8 white marbles, and 6 blue marbles. You draw 4 marbles out at random, without replacement. What is the probability that all the marbles are red? 1 The probability that all the marbles are red is...? 2 What is the probability that exactly two of ...

12/3+1/6 =24+1/6 =25/6

math
I'm having trouble setting this one up. The one I'm trying to figure out how to lay out in an equation is Roberto invested some money at 7%, and then invested \$5000 more than twice this amount at 9%. His total annual income from the two investments was \$3700. How much ...

physics
A force is applied to a 2.9 kg mass and produces 2.7 m/s 2 acceleration. What acceleration would be produced by the same force applied to a 6.2 kg mass? Answer in units of m/s 2 .

Math
were there parenthesis involved in this question?

Math
\$3.47

Chemistry
How many grams of ethanol, C2H5OH, can be boiled with 343.0 kJ of heat energy? The molar heat of vaporization of ethanol is 38.6 kJ/mol I'm not sure how I am supposed to set this problem up. Can someone help me, please?

math
the 5 ends up in the ones place (5.781203)

Math
6x2,6x20,and 6x200

mars hill. Math
how do I find the volume of a rectangular box that has a base of 50 in.² and the height of 12 inches

physics
a truck beneath an airplane that is moving 180 km/h at an angle of 47 to the ground. How fast must the truck travelto stay beneath the airplane? Answer in units of km/h.

math
y= 3x+ 9

Federal polytechnic, oko
What force would be required to accelerate an electron mass of 0.009kg from rest to a velocity of 104m/s in 10 seconds.

Physics
A tightrope walker wonders if her rope is safe. Her mass is 60 kg and the length of the rope is about 20 m. The rope will break if its tension exceeds 7500 N. What is the smallest angle at which the rope can bend up from the horizontal on either side of her to avoid breaking? ...

Math
It has four side and all opposite side are parallel and has no right angles