# Posts by Pierre

Total # Posts: 47

**math**

i had to simplify this. Am I right 7t + 3 + t +9 my answer is 8t + 12

**math**

If you flip a coin twice, what is the probability that a head or a tail will land up on the first flip. Express your answers as a percent.

**Math**

Billy has a board that's six and 2/3 feet long. He cuts it into 12 equal pieces. How long is each piece?

**heritage hihg school**

list the 13 prefixes and numerical value (exponent) in order from largest to smallest. (ex;a5 where a is the prefix and 5 is the exponent!)for u use u!

**math**

i really need your help please

**math**

vickie earns $20,000 a year as a bookkeeper.if she receive a raise of 2%,how could her new total alary be represented? 1] 0.02[$ 20,000] 2] $20.000/0.02 3] 0.02[$ 20,000] + 0.02 4] 0.02[$ 20,000]+ $20,000 5] $20,000-0.02 + $20,000

**math**

which of the following expresses 374,274 in scientific notation? 1] 3.74274 x 105 2] 3.74274 x 106 3] 37.4274 x 106 4] 374.274 x 105 5] 3742.74 x 103

**math**

two circles intersect at point T.if the small circle has a raduis of 4 and C is the center of the larger circle,then the diameter of the larger circle must be 1]4 2] 8 3] 12 4]16 5] not enough information is given

**math**

thanks

**math**

on a drive through allegheny county,natalie drove due west for 9 miles,then turned left and proceeded to drive due south.after traveling 12 miles south,what was the straight 12 miles line distance between where natalie startd and where she ended her drive? 1] 13 miles 2] 14 ...

**science**

I have an older furnace dryer which is used for drying copper ore, it operates at a temperature of 1000-to 2500 degrees F.I have low concentrations of hydrogen sulfide in the area.My question is can sulfur dioxide be produced without the ore present at these temperatures.

**Physics 2**

A 45 turn coil of radius 5.1 cm rotates in a uniform magnetic field having a magnitude of 0.49 T. If the coil carries a current of 40 mA, find the magnitude of the maximum torque exerted on the coil.

**English**

Find the direct object. Chief Joseph wanted equality for his people The direct object would be "wanted" right? Since it technically receives the action of the verb.

**statistics**

an industrial designer wants to determinethe average amount of time it takes an adult to assemble an easy-to- assembletoy .use the following data (inminites)a random sample, to construct a 95% confidence interval for the mean of the population sampled:17 13 18 19 17 21 29 22 ...

**Science**

Which pairs of substances will form a buffer when mixed in equal concentrations? A)NaOH and HCl B)NH3 and NH4+ C)H2O and NH3 D)KCl and NaCl E)HF and F-

**math**

how do you figure out the fraction a+1/6=3/5

**MINIMIZATION PROBLEM (CALC)**

A wire 9 meters long is cut into two pieces. One piece is bent into a square for a frame for a stained glass ornament, while the other piece is bent into a circle for a TV antenna. To reduce storage space, where should the wire be cut to minimize the total area of both figures...

**MINIMIZATION PROBLEM (CALC)**

A wire 9 meters long is cut into two pieces. One piece is bent into a square for a frame for a stained glass ornament, while the other piece is bent into a circle for a TV antenna. To reduce storage space, where should the wire be cut to minimize the total area of both figures...

**Calc**

A wire 9 meters long is cut into two pieces. One piece is bent into a square for a frame for a stained glass ornament, while the other piece is bent into a circle for a TV antenna. To reduce storage space, where should the wire be cut to minimize the total area of both figures...

**Calc**

A box has a bottom with one edge 3 times as long as the other. If the box has no top and the volume is fixed at V, what dimensions minimize the surface area?

**Calc**

A hemisphere of radius 5 sits on a horizontal plane. A cylinder stands with its axis vertical, the center of its base at the center of the sphere, and its top circular rim touching the hemisphere. Find the radius and height of the cylinder of maximum volume.

**Calc**

Water is leaking out of an inverted conical tank at a rate of 5800 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 8 meters and the diameter at the top is 6.5 meters. If the water level is rising at a ...

**Calc**

At noon, ship A is 50 nautical miles due west of ship B. Ship A is sailing west at 20 knots and ship B is sailing north at 20 knots. How fast (in knots) is the distance between the ships changing at 4 PM?

**Calc**

A spherical snowball is melting in such a way that its diameter is decreasing at rate of 0.4 cm/min. At what rate is the volume of the snowball decreasing when the diameter is 10 cm. (The answer is a positive number).

**Calc**

Gravel is being dumped from a conveyor belt at a rate of 10 ft^3/min. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 23 feet high?

**Calc**

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 16 knots and ship B is sailing north at 15 knots. How fast (in knots) is the distance between the ships changing at 7 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

**Chemistry**

how many grams of potassium bromide could be recovered by evaporating 650 grams of 15 perentKBr solution to dryness...... 650 * (.15) = 97.5 is this correct

**Chemistry**

is that correct..

**Chemistry**

how many grams of potassium bromide could be recovered by evaporating 650 grams of 15 perentKBr solution to dryness...... 650 * (.15) = 97.5

**history**

Comparing French, English, and Dutch Colonies, which ones attracted the most settlers, and which the fewest? In what colonies were women scarce? What impact did these differences in emigration have on various colonies' development?

**history**

Different labor systems predominated in various regions of British America. How did the economy of each region help determine its labor system?

**history**

What role did religion play in early European efforts at overseas colonization? Did religious factors always encourage colonization, or did they occasionally interfere with European expansion?

**Chem**

Is this correct NO2 + H2O ---> NO3 + H2 and is it hazardous

**answer please!!!!! Math**

what is the question....?

**math, answer please!**

if you have to find P then set them equal to zero eg p-7=0 p=7 OR foil it out eg (p-7)(p+8)=P2+p-56

**Chemistry**

so par say i should convert .1004 g ascorbic acid to mole/L.... if so then, is the 12 mole/L the conversion factor here?

**Chemistry**

21.46 mL of Iodine I2 was standards with 0.1004 g sample of ascorbic acid. At the blue starch end point, what is the molarity of the iodine I2 solution?

**Psych. (? on PTSD)**

Is there an increased or decreased parasympathetic nervous system arousal in people with PTSD?

**Mythology**

I need to find another mythological character other than Siddhartha who had a vast of wealth but was selfless and chose to help others instead.

**Art**

I need to find one famous piece of artwork of the Greek mythological character Narcissus other than a painting or statue. Is there a temple or architecture that features him that I don't know about?

**2nd grade**

Do we want to visit Milwaukee, Wisconsin?

**Math**

Marla is 25.

**Physics**

I'm not sure what we are doing wrong but the computer is saying -4500 is wrong

**Physics**

The temperature of a monatomic ideal gas remains constant during a process in which 4500 J of heat flows out of the gas. How much work (including the proper + or - sign) is done on the gas? J

**Physics**

my teacher says this is the incorrect answer. what could be wrong

**Physics**

An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m. Assume that the air in the room is composed of 79% nitrogen (N2) and 21% oxygen (O2). At a temperature of 27°C and a pressure of 1.01 105 Pa, what is the mass (in grams) of the air? g

**Physics**

I divided the 1.6605*10^-27 by 294.13 and got 1.77*10^-25kg, but that doesn't seem to be the right answer.

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