# Posts by justin

Total # Posts: 945

**Math**

Need to find equation for 1250=1200+4-375. Is this possible or impossible. Need to find how to figure these type of questions. This is 3rd grade homework

**physics**

answer is 60-apex

**language arts**

My mom went to the grocery store.she forgot her purse

**Physics**

FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths for these signals. largest I have used the equation, but im doing something wrong, so if i could get the answer instead of just the equation it would...

**Physics**

FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths for these signals. largest

**Physics**

FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths for these signals. largest

**math**

so how to do i find out if its a right triangle?

**math**

micheal drew a triangle with the sides measuring 12.5cm,30cm,32.5cm. using the pythagoream theorm determine of micheals triangle is a right triangle. explain. PLEASE HELP ME WITH THIS ONE!!

**algebra**

sara can take no more than 22 pounds of luggage on a trip. her suitcase weighs 112 ounces. how many more pounds can she pack and not go over the limit?

**Math**

What does x equal in x^2/(.81-x)?

**Chemistry**

What is initial concentration of a sodium acetate if the pH (at epuilibrium) is measured to be 9.30?

**chemistry**

Calculate the pH of a 0.87 M NaCN solution. Solve it exactly (no assume x=0.1)

**6 grade math**

how do you work out this problem, find the height of a parallelogram with an area of 224 square meters and a base of 16 meters.show work please thank you

**6 grade math**

how do you find the height of a triangle with an area of 245 square inches and a base of 14 inches.

**6 grade math**

find the height of a triangle with an area of square inches and a base of 14 inches

**6 grade math**

yes

**6 grade math**

how do you find the height of an area of 245 square inches and a base of 14 inches.

**Chemistry**

Which of the following would you add to a mixture of CaCO3(s) and its saturated solution to increase the molar solubility of CaCO3: more water, Na2CO3, NaOH, NaHSO4? Explain.

**chemistry**

A solution is saturated with Ag2CrO4. a) Calculate [CrO4^2-] in this saturated solution. b) What mass of AgNO3 must be added to 0.635 L of the solution to reduce [CrO4^2-] to 1.0* 10^-8M?

**physics**

5.6kg

**statistics**

dsva

**Living environment**

acidic substance secreted by glands in the stomach wall is it pepsin enzyme that breaks down starch into maltose is it salivary amylase organ in which bile is stored is it gallbladder

**chemistry**

Ca(OH)^2 does not completely dissociate. It only partially dissotiates in water to form OH- and Ca+2. An equilibrium mixture of Ca(OH) and its dissolved ions is found to have a pH= 10.3 what is Kc for this dissociation?

**Science**

Describe a hybrid plasmid. What is this?

**Stats**

a coin is tossed twice, or until the first "tails" appears, whichever comes first. which of the following is the sample space for this random experiment? A, S=(H, T) B. S=(T, HT, HH) C. S=(T, TT)

**statistics**

The data listed below shows the number of hospitals in each state, using the data, complete a frequency table using 8 classes. all the data has been ordered from smallest to largest. 7,8,12,14,14,15,15,15,19,21,23,25,29,30,34,36,36,38,40,40,51,53,55,56,59,61,63,71,73,74,75,76,...

**statistics**

The data listed below shows the number of hospitals in each state, using the data, complete a frequency table using 8 classes. all the data has been ordered from smallest to largest. 7,8,12,14,14,15,15,15,19,21,23,25,29,30,34,36,36,38,40,40,51,53,55,56,59,61,63,71,73,74,75,76,...

**perimeter problems math**

janet built a 5-inch ny 7-inch rectangle A:what is the perimeter of janets rectangle? B:the perimeter of olivia's rectangle is 150% as long as janet's. what is the perimeter of olivia's rectangle? C. what is the area of janets rectangle? D.the area of walters ...

**algebra**

28 decreased by 6 times a number is the same as the number

**IB MATH STUDIES IA**

I meant actually who has better memory

**IB MATH STUDIES IA**

I am finding whether men or women are smarter. I am doing a chi-squared test to see if theres a correlation. What other sophisticated processes can i do?

**English**

Find The Subject and Verb in this sentence. Candle wax dripped onto the table and hardened into pools.

**chemistry**

Hmm idk the answer

**Math**

The probability of getting an odd number is 5/10 using a game spinner. The denominator of that probability is:

**English**

What is the syntax in,bending, I bow my head and lay my hand upon her hair, combing and think how do woman do this for each other.

**Math**

The endpoints of one diagonal of a The The endpoints of one diagonal of a rhombus are (0, -8) and (8, -4). If the coordinates of the 3rd vertex are (1, 0), what are the coordinates of the 4th vertex? (7, -12) (7, -8) (-8, -4) (-4, -12)

**Algebra I**

(3x to the fourth - 5x squared - 6x +5) + (-4x cubed + 6x squared + 7x -1)

**math**

i don't know that's what i need help with

**science-VERY URGENT**

No, don't pick b because it's an isolating situation.

**science-VERY URGENT**

I would say C. No promises though. But go with c

**science-VERY URGENT**

Yeah hummingbirds is the answer

**science-VERY URGENT**

Hummingbirds. They have a huge beak thing to poke down the long tube. And they love red. Mice come out at night Bees have to land

**Biology**

Probably rough endoplasmic reticulum. An enzyme is a protein. You call it rough because it is studded with ribosome units. Ribosomes make proteins. More protein "factories" equals more enzyme to be released Note: Lysosome's are were you send proteins to be destroyed

**MATH**

SUPPOSE IT TAKES NO MORE THAN 25 MIN FOR YOU TO GET TO SCHOOL. IF YOU HAVE TRAVELED FOR 13.5 MIN ALREADY, HOW MUCH LONGER, AT MOST, MIGHT YOU TAKE TO GET TO SCHOOL? PLS HELP ME. I NEED TO SOLVE AN INEQUALITY THAT MODELS THIS PROBLEM. THANKS

**MATH**

THE AVERAGE WIND SPEED INCREASED 19 MILES/H FROM 8 AM TO 12 NOON. THE AVERAGE WIND SPEED DECREASED 5 MI MI/H FROM 12 NOON TO 4 PM. AT 4 PM, THE AVERAGE WIND SPEED WAS AT LEAST 32 MI/H. WHAT IS THE MINIMUM VALUE OF THE AVERAGE WIND SPEED AT 8 AM? NEED TO SOLVE AN INEQUALITY ...

**math, inequalties**

THIS SEASON, NORA HAS 125 AT BATS IN SOFTBALL. BY THE END OF THE SEASON SHE WANTS TO HAVE AT LEAST 140 AT BATS. HOW MANY MORE AT BATS DOES NORA NEED TO REACH HER GOAL? PLEASE HELP, I NEED TO WRITE AND SOLVE AN INEQUALITIES THAT MODEL THE SITUATION. THANKS

**math, inequalties**

IT WILL TAKE AT LEST 360 POINTS FOR KIKO'S TEAM TO WIN THE MATH CONTEST. THE SCORES FOR KIKO'S TEAMMATES WERE94, 82, AND 87, BUT ONE OF KIKO'S TEAMATES LOST 2 OF THOSE POINTS FOR AN INCOMPLETE ANSWER. HOW MANY POINTS MUST KIKO EARN FOR HER TEAM TO WIN THE CONTEST

**3rd Grade math**

What multiplication fact can be found by using the arrays of 2x9 and 5x9?

**Calculus**

5.60 ft and 5.60 ft

**science**

help im stuck!!!!!!!

**science**

How did Archimedias prove mathematically that salt water and diving were related to buoyancy?

**social studies geography**

I need help with social studies definition of social ranking

**math**

After flying at an altitude of 600 meters,a hot air balloon starts to descend when its ground distance from the landing pad is 10 kilomeers.What is the angle of depression for this part of the flight?

**science**

a 425 g cylinder of brass is heated to 90/0 degree C and placed in a calorimeter containing 334 g of water at 25.0 degree C. The water is tirred and its highest temperature is recorded as 32.0 degree C. From the thermal energy gained by the water, determine the specific heat ...

**science**

as 390 g of hot milk cools in a mug, it transfers 30,000 J of heat to the environment. What is the temperature change of milk? The specific heat of milk is 3.9 J/g degree C.

**science**

how many kilojoules of heat must be transferred to a 480 g aluminum pizza pan to raise its temperature from 22 degree c to 234 degree c? The specific heat of aluminum in this temperature range is 0.97 J/g degree C.

**SS**

Thanks.:D What are the 2 others? Does anyone else know?

**SS**

What are the 3 most visited "natural attractions" in the U.S.?

**Math**

wedsday

**SOCIAL STUDIES**

In 1900 for health reasons the course of what river was changes in the U.S. making it world's only river to flow backwards?

**algebra**

Dale is choosing between two exercise routines. In Routine #1, he does only running, burning 10 calories per minute. In Routine #2, he burns 10 calories walking. He then runs at a rate that burns 8 calories per minute. For what amounts of time spent running will Routine #1 ...

**Chemistry**

At2 26.3C, F2 molecules have a certain value of rms speed. At what temperature would the rms speed of O2 molecules be the same?

**social studies**

what is the landmarks of newjersey?

**Finance**

I have a case study to do and I'm not sure how to go about it. I need to find the present value for three different offers, all of which have a 10% rate and ordinary annuities. This is the first offer: $1,000,000 now $200,000 each year for years 6 through and including ...

**math**

find the average 2 1/3 3 3/4

**math**

find the average 5/8,2/5,1/40

**math**

8/25 / 1/5 *6/5

**Chemistry**

I have this question and I am pretty sure on what to use to solve it but I am just stuck. The reaction of 8 g of hydrogen and 28 g of carbon monoxide gave 16 g of methanol. What was the theoretical yield if the percent yield was 50%? actual yield ________________ X 100% = ...

**geometry**

MN and ML are oppisite rays if

**Math 7**

How do you plot the answer ( on a number lime) if all three answers are the same?

**Chem**

write the dissociation of acetic acid identifying the base,acid,H donor, and H receiver C2H4O2+H2O - H3O+C2H3O2 is hydronium the H donor and is C2H3O2 the base?

**Chem**

my guess is 10,000 because ph is a log scale but that seems off

**Chem**

How many more [H+] are there in a sol’n of pH2 than pH6?

**watson go to birmingham**

what are the watsons like? do you thing their "weird"?

**MATH PLEASE HELP!!!!!**

i got 5.5

**History**

homo sapiens came to north america by...????

**physics**

. A water heater can has a power of 350 W. It is placed in a container filled with 1 litres of water with a temperature of 40 ºC. The heater is then allow to run for 1 hour. How much water will there be left in the container after 1 hour? (Specific heat capacity of water...

**physics**

A diver descent 100 m below sea level. If the density of sea water is 1024 kg m-3, find the pressure she will experience.

**math 1012**

what is the sum of the lengths 39cm and 2m

**Geometry**

I have a question! Can someone please answer the same question but with the numbers 35, 56, 35, 84,110

**Pre Calc**

Verify the following identity: sin(x)*cos(x)*(cot(x)+tan(x))=1 show work

**Physics**

A 0.02 kg-lead bullet traveling 200 m/s strikes an armor plate and comes to a stop. If all of it's energy is converted to heat that it absorbs, what is the temperature change?

**chemistry**

If 1.5 mol of each of the following compounds is completely combusted in oxygen, which one will produce the largest number of moles of H2O and why?

**Physics**

A 3.00-liter aluminum cylinder at 5.00°C is filled to the brim with gasoline at the same temperature. If the aluminum and gasoline are warmed to 52.0°C, how much gasoline spills out? [Hint: Be sure to account for the expansion of the container. Also, ignore the ...

**algebra 2**

if a3 = 20 and a6=41 for an arithmetic sequence, find a1

**7th math**

Simply the expression. -1 - (-3x + 2) - 7x + 8

**2nd Grade Math**

How do you complete a mysterious missing digit using subtraction Question example Tens. Ones 8. ____ ____. ____ -5. 7 3. ____. Answers

**physics**

A moving object has a kinetic energy of 133 J and a momentum with magnitude of 39.8 kg·m/s. Detemine the mass (kg), and velocity (m/s) of the object.

**science**

list two things green plants need to grow and thrive

**science**

I would like to know migration helps butterflies survive?

**Thermo engineering**

The driveshaft of a building’s air-handling fan is turned at 300 RPM by a belt running on a 0.3-m-diameter pulley. The net force applied by the belt on the pulley is 2000 N. determine the torque applied by the belt on the pulley, in N.m, and the power transmitted, in kW.

**Thermo Dynamics**

Air loses heat to the surroundings at a rate of Q.= t/6 where out Q. is in Watts and t is time in seconds. For 20 minutes of operation, determine the heat loss from the air in kWhr???

**Math**

Hai take 12 minutes to walk to school. He wants to get there.15 mins early to meet with his lab partner. What time shod he leave his house is school starts at 8:10 am?

**Algabra**

I need help solving this using U- Substitution (x^2-4)^2 + (x^2-4) -6=0

**Finance**

Using Monte Carlo simulation, calculate the price of a 1-year European option to give up 100 ounces of silver in exchange for 1 ounce of gold. The current prices of gold and silver are $380 and $4, respectively; the risk-free interest rate is 10% per annum; the volatility of ...

**Math: Statistics**

My homework has a list of numbers and I'm working with standard deviation. I know the standard deviation as well as the mean and everything, but it says to find "the weight that is 3 standard deviations below the mean." What is the formula for that, and can I do ...

**physic**

b) •It is done by Carbon dating. Carbon is the basic basic building block of life and has an amazing memory. Rays of the Sun which are radioactive enter our atmosphere and collide with Nitrogen atoms to create the radioactive isotope, Carbon-14. •We have both Carbon-...

**math**

At the end of an basketball game daniels couch told him he scored 20% of all of his teams points. If Daniel scored 19 points exactly how many points did his team score?

**trig**

Match each ratio in the first row with an equivalent ratio from the second row if angle A plus angle B = 90 degrees. SinA CosA TanA CscA SecA CotA SinB CosB TanB CscB SecB CotB Does this question even make sense?

**Calculus**

Using L'Hopital's Rule, find the limit: lim x->0+ (as x approaches 0 from the right) of sinx/x^(1/3)