# Posts by y

Total # Posts: 48

**World history**

1. Which statement best describes the period known as the Old Kingdom? It was a time of dynastic uncertainty. It was a time of development. It was a time of great geographic expansion.*** 2. In what way was the Nile both a benefit and a disadvantage for Egypt? It provided ...

**math**

draws a card from a standard deck of 52 cards. She replaces the card and draws a second card. What is the probability that she draws a heart and then a spade?

**math**

Thanks for replying me, Reiny! I understand for the first one completely, but for the second one, did u use the annuity formula which is P[1-(1+r)^-n/r] ?? Because using (n-1) doesn't make sense to me..

**math**

Rochelle deposits $350 in an account that earns 6% annual interest, compounded quarterly. How much money will be in the account in 8 years? 350(1.06)^32 =2258.685339 Can anyone check what I'm doing is correct or not? Janet deposits %150 every month in an account that earns...

**Precalculus**

The "ã" are suppose to be square root symbols.

**Precalculus**

Find each of the sums indicated or described. Show use of the appropriate formula, rather than simply using a calculator to add them. 1) The sum of the first 17 terms of a geometric series with a first term of 3000 and a common ratio of 1/2. 2) 7+9+11+13+... 10 terms 3) 1 + &#...

**chemistry**

Enter a chemical equation for the ionization in water of CH3CH2COOH. Is the acid strong or weak? Select the Lewis structure for the ion formed by the acid when it ionizes. Chemical equation: Note: Include physical states.

**MATH**

A GREAT PYRAMID HAS A SQUARE BASE 230M ON EACH SIDE. THE 4 TRIANGULAR FACES EACH MAKE AN ANGLE OF 51.50' WITH THE GROUND. 1) HOW TALL IS THE PYRAMID ? 2) WHAT ARE THE DIMENSIONS OF EACH OF THESE TRIANGULAR FACES ?

**Economics**

Does this production possibilities curve reflect the law of increasing opportunity costs.explain

**calculus**

Can you help me solve this problem? I really don't know what to do. I solve problems like for example the rate of change of the elevation but I just encountered this kind of problem so I really don't know what to do. Please help me The endpoints of a movable rod of ...

**bean**

each square on the grid represents 25 square units----draw a rectangle of 875 square units

**maths**

What is 9x²+3x-2=0

**matg**

Kay is trying to decide between two job offers. The compensation package for job A includes 80% of the cost of a $300-per-month health insurance plan, 90% of the cost of a $40-per-month life insurance plan, a salary of $65,000 per year, and a 5% match on 401(k) contributions. ...

**math**

When x=2, shouldn't f(x) equals 2 as well? This chart says when x=2, f(x)=3, when x=3, f(x)=5, when x=7, f(x)=6, and so on. What does it mean?

**science(please check answers)**

thanks

**Physics**

no

**Geometry**

TU is wrong it's (square root) (5+2)squared+(-1+1)squared=7

**chemistry**

convert the know heat of fusion of water,334j/g to these units. the conversion between calories and joules is 1 cal = 4.184j

**calculus**

A man 2m tall walks away from a lamppot at 1m/s. If te lampatop the post is 5m above the ground, how fast is te tip of is sadow moving? How fast is the length of his shadow changing?

**PHYSICS**

A 40 kg child stand on one end of a 70 kg canoe hat is 4 m in length. The boat is initially 3 m from a dock. The child notcies a turtle on a arock near the far en of the canoe so she proceeds to walk to the far ed off the canoe o get the turtle. a) neglecting any friction, ...

**Calculus**

If the volume of a spherical ballon is increasing at 4 pi m^3/ min when its radius is 2m, how fast is its surface are increasing at the same time

**CALCULUS**

Sand is being poured from a converyer belt forming a conical pile whose base diameter is eual to its height at all times. If the base diameter is inreasing at 2 m/min when the base is 2 m wide. How fast is the sand being poured onto the pile?

**CALCULUS**

A pile of sand in the shape of a cone whose base diameter is 4 times its height is being built up at 12 pi m3/min. How fast is the height of the pile increasing 3 min after the pouring begins.

**physics**

Tarzan (m = 68kg) swings down from a height of 4.8m on a vine to save Jane (m = 35kg) from some hungry hippos. if he gravs jane in an inelastic collision at the bottom of the vine's path, how high will they swing up to after the collision?

**physics**

A 45g golf ball is hit with a golf club. the head of the club has a mass of 0.19kg and travels 63m/s before the collision. the ball has a speed of 72m/s as it leaves the face of the club. what is the speed of the club after the collision?

**microeconomics**

1. 40 2. 400

**Chemistry Lab**

0.176

**math**

Application Giovanni is flying his Cessna airplane on a heading as shown. His instrument panel shows an air speed of 130 mi/h. (Air speed is the speed in still air without wind.) However, there is a 20 mi/h crosswind. What is the resulting speed of the plane?

**english**

rewrite the question in an unbiased way. do you like the long walk to school or prefer to take the bus or get a ride

**physics**

You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 206.5 ppm and is initially uniform through the thickness of the steel. The atmosphere of...

**math**

HELP PLEASE!!!! The question is: Carmella works 37.5 h per week for Century Home selling electronics equipment. She earns a base salary of $12/h and receives a commission of 5 cents for every dollar of sales she make. Her chart goes like: WSales($):Commission($): TotalSalary...

**Physics**

rt

**Biology**

Bang

**math**

Evaluate: 2xto the ninth power-(y+z) x=-1 y=7 z=-7

**Chemistry**

662.5 liters

**calculus 2**

26

**calculus 2**

evaluate: ¢²_(k=1)^¡Ä¢Æ(¡î(k+1)+¡îk)/¡î(k^2+k)

**science**

I want to know how to solve this and answer pls!

**Physics**

10.5

**physics**

The space shuttle traves in orbit at 210000 km/hr. How far will it travel after 5.0 hrs?

**algebra 2**

List the domain and range and determine whether the relation is a function.(2,4)(4,-2)(1,3)(0,3)

**Physics - HELP**

2341234

**English**

I've asked myself THE question over and over again. When on Earth am I going to write something in English class that somebody would actually want to read other than the teacher? Throughout my school carrer I've been wandering this and began hating English. I can't...

**Chemistry**

rubidium sulphite or rubidium (1) sulphate

**Physics II**

I =(B*L)/(μ_0*N)

**egypt mummification**

why did that post 2 times?

**egypt mummification**

OMG I have same exact wrk sheet - so annoying i'm in sixth grade. I saw it and i was like what the f***

**pigskin geography**

week#9