# Posts by Please help!!!

Total # Posts: 54

**math**

A sixth-grade class has 20 total students, while the entire middle school has 1,000 students. A census is taken of the entire school’s population to see on which day of the week every student was born. Theoretically, 14.3%, or 1/7 of the students should have been born on ...

**Math**

Can u explain how u did it on my question

**Math**

Mr. Jones makes 3% commission on his sales of widgets. At a different company, Mr. Smith makes 5% commission selling the same widgets at the same price. Mr. Smith sold 500 fewer widgets than Mr. Jones, and they both earned the same commission. How many widgets did Mr. Smith sell?

**7th grade Pre- Algebra**

R/5 - 6 = -1 I know the answer is 25, but can you show me the steps. Thank you.

**physics**

A 40kg box of sweet cherries at 10 ° c cosisting of 30kg water and 10kg cherries is to be frozen at -30°c.Calculate the total amount of heat that needsto be removed from the cherries . The specific heat capacity of cherries is 3.43kj /kg°c. The specific ccapacity ...

**Physics**

When you suddenly stand up after lying down for a while, your body may not compensate quickly enough for the pressure changes and you might feel dizzy for a moment. (a) If the gauge pressure of the blood at your heart is 15.02 kPa and your body doesn't compensate, what ...

**Physics**

The bulk modulus of a liquid is 4.0 10^10 N/m2. Suppose a volume of 0.6 m3 of the liquid is taken from the surface where the pressure is approximately that of the atmosphere (1.00 10^5 N/m2) and is lowered into a pool of liquid to a depth where the pressure is 2.00 10^7 N/m2. ...

**Physics**

no matter how i work it out, i keep getting the wrong answers. please help!!! i only have two more submissions before it closes on me. A sample of blood is placed in a centrifuge of radius 14.0 cm. The mass of a red blood cell is 3.0 x 10^-16 kg, and the magnitude of the force...

**Physics**

Know matter how i work it out, i keep getting the wrong answers. please help!!! i only have two more submissions before it closes on me. A sample of blood is placed in a centrifuge of radius 14.0 cm. The mass of a red blood cell is 3.0 x 10^-16 kg, and the magnitude of the ...

**Physics**

Know matter how i work it out, i keep getting the wrong answers. please help!!! i only have two more submissions before it closes on me. A sample of blood is placed in a centrifuge of radius 14.0 cm. The mass of a red blood cell is 3.0 ✕ 10−16 kg, and the ...

**math**

Cecilia created 2.5 liters of a chemical mixture for an experiment. Saline soltution accounted for 12.5% of the mixture. How many liters of saline solution were in the mixture? a.) 0.3125 liters b.) 2.1875 liters c.) 3.125 liters d.) 31.25 liters

**math**

435 is 15% of what number? a.) 6.525 b.) 65.25 c.) 2,900 d.) 29,000

**math**

What is 38% of 560?

**math**

Someone please help me with this!

**math**

Two friends worked out on treadmills at the gym. •Alden walked 2 miles in 3/4 hour •Kira walked 1 3/4 miles in 30 minutes Who walked at a faster rate?

**math**

Thanx Ms.Sue :)

**math**

Someone please help me with is!

**math**

Beth plays a video game in which she starts with 0 points. In round 1, she loses 3 1/2 points. In round 2, she wins 28 1/2 points, and in round 3 she loses another 3 1/2 points. What is her final.score?

**math**

Lexi and Maria had $250 altogether. After Lexi spent 2 over 5 of her money and Maria spent $40, they had the same amount of money left. How much money did Lexi have in the beginning?

**math**

What is the percent of each number? 1. 3% of 45 2. 44% of 125 3. 95% of 64 4. 2% of 15.4 Show your work

**math**

If Julie bought 8 T-shirts, she would be short $28. If she bought 4 T-shirts and 3 baseball hats, she would have $17 left. If each hat cost $5, how much money did she have in the beginning

**MATH 11**

Yani wants to make a scale diagram of the floor plan of his school. He wants his diagram to fit on an 8.5in. by 11in. sheet of paper. The school is 650ft long and 300 ft wide at its widest point. a) what would be a reasonable scale for Yani to use so that his diagram will fit ...

**Algebra**

Please

**math**

Rationalize the Denominator of the expression. 5/ãdh

**math**

The rise of digital music and the improvement to the DVD format are part of the reasons why the average selling price of standalone DVD recorders will drop in the coming years. The function below gives the projected average selling price (in dollars) of standalone DVD ...

**physics**

A car travel at 60 km/h. It the accelerates at 3.6m/s^2 to 90km/h.how long does it take to reach a new speed. How far does it travel during acceleration...the first answer I got is 2.2s and the other question I got 47m..i was checking to see if I was correct

**physics**

A car traveling at 60km/h. It then accelerates at 3.6m/s^2.How long does it take to reach a new speed. How far does it travel during acceleration.

**Physics**

never mind... I just figured it out!

**Physics**

A diver stands at rest at the end of a massless diving board as shown in Figure P8.16. (a) If the mass of the diver is 161 kg, and the board is 4 m long, what is the torque due to gravity on the diving board? I was thinking that T=Frsin(theta)... but I can't seem to get it...

**Calculus**

please someone help me out, this question is driving me crazy!!!

**College Physics**

The roller coaster in Figure P6.36 starts with a velocity of 15.4 m/s. One of the riders is a small girl of mass 30 kg. Find her apparent weight when the roller coaster is at locations B and C. At these two locations, the track is circular with the radii of curvature given in ...

**Physics**

A baseball pitcher can throw a baseball at a velocity of 44.5 m/s. If the mass of the ball is 0.12 kg and the pitcher has it in his hand over a distance of 1.79 m, what is the average force exerted by the pitcher on the ball? Any ideas?

**College Physics**

When searching for gold, measurements of g can be used find regions within the Earth where the density is larger than that of normal soil. Such measurements can also be used to find regions in which the density of the Earth is smaller than normal soil; such regions might ...

**Chemistry**

The environmental protection agency allows 10 ppb concentration of arsenic in drinking water. What is the molarity of As in this solution?

**Chemistry**

The environmental protection agency allows 10 ppb concentration of arsenic in drinking water. If an 8 oz glass of water is at 10 ppb, how many ug of arsenic (As) is present? (8 oz= 236mL)

**Chemistry**

If a person has a BAC (blood alcohol concentration) of 0.08% v/v, would it be considered higher than the legal limit if the legal limit was 0.08 g/dL? (The density of ethanol is 0.789g/ mL)

**Chemistry**

How do I balance the following into an equation? 10 mL of 2.0 M HCl is react with 8 mL of 1.7 M Ca(OH)2 in a neutralization reaction.

**History**

I know that WWII and the holocaust are definietly completely different things I don't know about your second questions though...

**MATH**

Two planes leave an airport at the same time, one flying east, the other flying west.The eastbound plane travels 100 mph slower. They are 3040mi apart after 4hrs. find the speed of each plane

**American History**

What is the significance of providing an official charter, such as was given to Sir Walter Raleigh by Queen Elizabeth?

**Math**

x/4 - 3x/2 = -1/2

**Mat**

1/4c + 2 = 3/4 c=?

**Writting**

I need to write a 5-graph paragraph about either 1. A time I was dissapointed or 2. A situation that is negative but turns out positive. it doesn't have to be something that really happened in your own life. I can't think anything though so I was wondering if I could ...

**MATH**

Find the percent of markup. Wholesale price: $34 Selling price: $42.50

**MATH**

Solve for a 18= -a + 2

**math(algebra 1)**

i don't get these please help me: use the subtitution method to solve the linear system 1)3x+y=0 x-y=4 2)y=-3x-1 x-3y=3 3)3x-y=9 2x+y=6 4)x-2y=0 3x+y=0 Thank you!!:)

**MATH**

I don't understand

**MATH**

Greatest common factor of 4x^2y^3 and 6xy^2

**MATH**

how did you get 435?

**MATH**

Erics 4 test grades are 85, 75, 97, 93 . What must she make on her 5th test to have an average of 87?

**Math**

9.6 L = _____ mL

**MATH**

Use the formula p - 2L + 2W to find th perimimeter of the triangle Length- 8.6 m Widith- 2.5 m

**trig**

how do you do sinAcosA=cosA-cos^3A/sinA

**war on iraq**

couldi have info on how u.s. citizens in iraq are being unconstitutinal unprisoned there.

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