# Posts by kaley

Total # Posts: 52

**Statistics **

A study is conducted regarding shatterproof glass used in automobiles. Twenty-six glass panes are coated with an anti-shattering film. Then a 5-pound metal ball is fired at 70mph at each pane. Five of the panes shatter. We wish to determine whether, in the population of all ...

**Physics**

A car traveling at 71 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 63 cm (with respect to the road) while being brought to rest by an inflated air bag. What magnitude of force (assumed constant) acts on the passenger's upper torso, which...

**Chemistry**

In a volumetric analysis experiment, a solution of sodium oxalate in acidic soltuion is titrated with a solution of potassium permanganate according to the following balanced chemical equation: 2KMnO4+8H2SO4+5Na2C2O4 -> 2MnSO4+8H2O+10CO2+5Na2SO4+K2SO4 What volume of .0239 M...

**physics**

To determine an athlete's body fat, she is weighed first in air and then again while she's completely underwater. It is found that she weighs 690 N when weighed in air and 36.0 N when weighed underwater. What is her average density?

**physics**

A spacecraft is traveling with a velocity of v0x = 5690 m/s along the +x direction. Two engines are turned on for a time of 845 s. One engine gives the spacecraft an acceleration in the +x direction of ax = 1.35 m/s2, while the other gives it an acceleration in the +y ...

**Math**

Thanks Steve

**Math**

Freddy and Frankie want to know their grandmother's age. She tells them that the digits of their age make up her age. She also tells them that their age plus her age total 83. What is the age of the grandmother? Please explain this question step by step.

**art history**

I don't really know how to explain the answer except by looking at said paintings. But the answer is David

**Math**

Shania is having trouble understanding her algebra assignment. To help her understand, she asks Mark why is not equal to . Which of the following responses would be best for Mark to give?

**Physics**

As its volume is doubled from an initial value of 0.088 m3, a sample of gas is held at a constant pressure of 3.4 × 104 Pa by heating. Then, while a constant volume is maintained, the gas is cooled back to its initial temperature. The work that the gas does on the ...

**Physics**

A system performs 349 J of work on its surroundings while losing 133 J of internal energy. Determine the heat transferred to the system during this process.

**Algebra 2**

find all the zeros of the polynomial function F(x)= x^4+4x^3-6x^2-36x-27

**Math Urgent**

Two surveyors with two-way radios leave the same point at 9:00am., one walking due south at 2 mi/hr and the other due west at 5 mi/hr. How long can they communicate with one another if each radio has a maximum range of 10 miles?

**Algebra**

A rectangular plot of ground having dimensions 24 feet by 26 feet is surrounded by a walk of uniform width. If the area of the walk is 104 feet squared, what is its width?

**Algebra**

A boy can row a boat at a constant rate of 5 mi/hr in still water. He rows upstream for 19 minutes and then rows downstream, returning to his starting point in another 13 minutes. What is the rate of the current? What is the total distance traveled?

**English**

I know that 'you' and 'I' are pronouns but are words like 'you're' and 'I'm still classed as perosnal pronouns? thanks

**Chemistry**

How many moles of Mg2+ and NO3- form for each mole of Mg(NO3)2 that dissolves?

**chemistry**

How many H2O molecules are formed when 14 methanol molecules react?

**Algebra**

Indicate in standard form the equation of the line passing through the given points. A(4, 1), B(5, 2)

**algebra**

5/7-3/4=

**General Chemistry**

What is the molarity of a solution produced by dissolving 61 g of KNO3 in a 100 mL volumetric flask?

**Economics**

What will be the outcome to global economics and the condition of man given increasing global birth rates and why?

**Geometry**

What is the ratio of the area of triangle XBY to the area of triangle ABC for the given measuremnts, if XYis similar to AC, and BY=2 and BC=4?

**Geometry**

Is this true or false? Two similar hexagons have area 36 square inches and 64 square inches. The ratio of a pair of corresponding sides is 9/16.

**Geometry**

A circle has a radius of 6 inches. The circumscribed equilateral triangle will have an area of:?

**Geometry**

The shortest side of a polygon of area 196 square inches is 4 inches long. What is the area of a similar polygon whose shortest side is 8 inches long?

**Geometry**

i don't understand this

**Geometry**

One side of a triangle is 15 inches, and the area of the triangle is 90 square inches. What is the area of a similar triangle in which the corresponding side is 9 inches?

**Geometry**

?

**Geometry**

What is the ratio of the area of triangle XBY to the area of the triangle ABC for the given measurements, if XY is similar to AC, and XY=2 and AC=3

**Geometry**

What is he ratio of the area of triangle XBY to the area of triangle ABC for the given measurements, if XY is similar to AC, and BY=3, YC=2 ?

**Geometry**

so 4/9 ?

**Geometry**

i don't seem to understand the concept

**Geometry**

BY=3, YC=2

**Geometry**

What is the ratio of the area of triangle XBY to the area of triangle ABC for the given measurements, if XY is similar to AC?

**Geometry**

A circle has a radius of 6 in. The inscribed equilateral triangle will have an area of: ?

**Geometry**

how would you write it with the root on top divided by another number?

**Geometry**

Two similar polygons have areas of 50 and 100 sq. in. What is the ratio of the length of a pair of corresponding sides?

**Geometry**

The sides of a quadrilateral are 3, 4, 5, and 6. What is the length of the shortest side of a similar quadrilateral whose area is 9 times as great?

**math**

To keep his wigwam

**Global History**

my name is kaley and i try but the material is just confusing sorry :/

**Global History**

How did the Alliances lead to world war 1? How did nationalism lead to world war 1?

**math**

What value of a makes f(x)=X^2 + (a/x) have a) a local minimum at x=2? b) a point of inflection at x=1?

**calculus**

find the points at which the graph of 4x^2 - 4x + 12y^2 -6y = 10 has a vertical and horizontal tangent line. For the vertical only solve for y and for the horizontal only solve for x. I got the deriviative to be: (8x-4)/(-24y + 6). For the horizontal, x = 1/2 For the vertical ...

**science**

Then is it zooplankton and sea anemone?

**science**

Which would be a pair of ecological equivalents? zooplankton andsea anemone salmon and seagull rattlesnake and desert rat elephant and hyena zebra and wild horse

**9th grade algebra**

how to do algebra

**math**

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take for both of them to paint the house? the answer is 2 hrs and 24 min. How did they come up with that?

**Literature**

All of them are A.

**Criminal Justice**

As a detective with a local law enforcement department, you are one of the first to arrive at the scene of a drive-by shooting, which resulted in the death of a teenage male. The shooting occurred at a corner gas station of a low-income neighborhood. A number of witnesses ...

**French**

i need to learn french

**math**

recall that the acceleartion due to earth's gravity is 32 ft/sec^2. from ground level, a projectile is fired straight upward with velocity 90 feet per second. a. what is its velocity after 3 seconds b. when does it hit the ground c. when it hits the ground, what's the ...