# Posts by Olivia

Total # Posts: 593

**Stats**

Let Y = the number of hours a student studies for the midterm. From previous semesters we know that Y ? N(6, 1.5). What is the probability that for 100 randomly chosen students, their mean study time will be more than 6.3 hours?

**math**

a piece of copper wire is 8.5cm long and weighs 52g. what would a 100cm wire weigh

**Math**

There were 30 boys and 25 girls in a gym. What is the ratio of boys to girls in the gym?

**Algebra**

3f is the number of ones f-1 is the number of ten rest is 20s total is 120 break down the problem and write what you know. 120=3f+f-1, the rest is 20s. 120=4f rest is 20s 4 times five is 20 20+ the rest is twenties=120 -20 -20 the rest are 20s=100 100/20=5 there are five 20s. ...

**Calculus**

If the instantaneous rate of change of f(x) at (2,-4) is 5, write the equation of the line tangent to the graph of f(x) at x=2.

**Calculus**

Actually, I'm looking for f(a) and f'(a), so i know I can just plug in the x value for f(a) which f(4) would equal -11, but how do i find the derivative in this case?

**Calculus**

How do you find the original function given a point (a,b) and the equation of the line tangent to the graph of f(x) at (a,b). For example: The point is (4,-11) and 7x-3y=61 is the equation of the line tangent to the graph of f(x)

**Calculus**

How do you find the original function given the equation of a tangent line and two points?

**Algebra**

A homeowner wants to enclose a rectangular piece of land beside a river. He must put a fence on 3 sides of the field (the river forms the fourth side). The field has length L (which runs parallel to the river) and width W. The homeowner has 200 yards of fencing material. What ...

**American Government**

elastic

**Math**

Triangle LMN is similar to Triangle XYZ The scale factor of triangle LMN to Triangle XYZ is 2:5 what is the length of the zx

**chemistry**

How many milliliters of an aqueous solution of 0.238 M magnesium bromide is needed to obtain 9.01 grams of the salt?

**English **

What do you suppose McPhee means by “the influence of Ernest Hemingway evidently extended to the Pentagon”? This is the context this question is referring to: And inevitably we have come to Ernest Hemingway and the tip of the iceberg—or, how to fashion critical ...

**GEOGRAPHY**

If the time at town A(LONGITUDE 75"W)is 5pm on friday.What will be the time and day at town B(LONGITUDE 120"E)

**Geometry**

(SAT Prep) The perimeter of pentagon ABCDE is 30 in, AB = 7 in, BC = CD = 6 in, DE = 5 in. How many sides of the pentagon have equal length?

**Maths**

If 2 numbers have a difference of 2.38, one number is 3 times bigger than the other number and the two numbers both add up to 6, what could the two numbers be?

**math**

Everyone on this site is a volunteer. They will get to your question when they can, so please be respectful. Also know that they will not do your work for you, instead, you can submit an answer or get someone to walk you through finding out the answer.

**Math**

Fruit smoothie five dollars coupon for 40% off find the price of each product after a discount is applied

** Math **

Color pencils are six dollars and the discount rate is 5% find the price of each product after a discount is applied

**Math 12**

A car is purchased for $30,000. It depreciates at a rate of 18% per year. What equation would represent the value, y, of the car after x number of years? Use this equation to find the value of the car after five years.

**Maths**

4y-3x=25 is the tangent to the circle x^2+y^2=25 at the point P(-3,4). The equation of the radius of the circle that passes through P is... Working out is appreciated. Thanks a lot

**Mathematics**

Can someone check my answers? 1. For the data in the table, does y vary directly with X? If it does write an equation for the direct variation.(X,y) (8,11) (16,22) (24,33) Yes y=2.75x Yes y=0.6875x*** Yes y=1.375x No y does not vary directly with X ** (For #1, I'm debating...

**social studies**

what is a landmark that usually rises more than 2,00 feet above sea level

**Social Studies**

Hi Lily, as you said, the connection between the three was that they set the Southerners and Northerners against eachother because of slavery. The question was, "How did the southern response to the election of 1860 election results demonstrate this connection?" Well...

**American Government**

states right

**calc**

find dy/dx for y^2+2xy-x^3=12 so far, i have (2y)(dy/dx)+(2)(dy/dx)=3x^2

**algebra**

When asked to write the prime factorization of the number 27 a student wrote 9•3 explain the error and write the correct answer

**English**

OK...So can you tell me what to write?

**English**

What I am supposed to write...I chose the selection number 4..

**English**

26. Write a paragraph that answers the questions below. Include at least two supporting details or examples. In “the literature of the Americas,” Kimberly Koza writes; “By discovering the literature of our neighbors, we may also learn about ourselves.” ...

**Math**

A store is having a 20% off sale on all merchandise.if jada buys one item and saves $13 at the sale what was the original price of her purchase?explaine

**Physics**

A wooden block of mass 9 kg is at rest on an inclined plane sloped at an angle theta from the horizontal. The block is located 5 m from the bottom of the plane. A) Find the frictional force for theta = 20 B)If the angle is increased slowly the block starts sliding at an angle ...

**ela**

1. Which of the following is not part of the rising action in "Raymond's Run"? (1 point) A. Squeaky and Raymond confront Mary Louise and her friends on Broadway. *** B. Mr. Pearson hints to Squeaky that she should consider letting the new girl win. C. Squeaky is ...

**Language Arts**

did u finish this and get answers yet like did u finish the test

**Math**

The least common multiple of two numbers is 60, and one of the numbers is 7 less than the other number. What are the numbers? Justify your answer.

**Aviation Security**

20) D

**math**

Sandra has some money she spends 2/7 of it on a book & she spends 2/5 of the remaining money on a bag Sandra has $15 left how much did she have to start

**Math**

At 2:30 p.m. the thermometer outside of sharlene's window read 44.c. it had risen 3. between noon and 2:30 p.m and 12. between 7:00 a.m and noon. What was the temperature at 7:00 a.m

**Chemistry**

A solution of concentrated NaOH is 16.4 M. If the density of the solution is 1.43 g/mL what is the percent by mass NaOH?

**math**

in a box plot the first quartile is x the median is y and the third quartile is 70. the median separates the box into 2 quartiles each with the same range

**Biology**

The first one would be cell,tissue,,organs, organs system, organism.

**Chemistry**

A reaction between gaseous sulfur dioxide and oxygen gas to produce gaseous sulfur trioxide takes place at 600◦C. At that temperature, the concentration of SO2 is found to be 1.14 mol/L, the concentration of O2 is 1.39 mol/L, and the concentration of SO3 is 3.18 mol/L. ...

**Chemistry**

use the appropriate standard reduction potentials in the appendix of your book to determine the equilibrium constant at 285 K for the following reaction under acidic conditions 4H+(aq) + MnO2(s)+2Fe+2(aq)----> Mn+2 (aq)+2Fe3+(aq)+2H2O(l)

**Chemistry**

use the appropriate standard reduction potentials in the appendix of your book to determine the equilibrium constant at 285 K for the following reaction under acidic conditions 4H+(aq) + MnO2(s)+2Fe+2(aq)----> Mn+2 (aq)+2Fe3+(aq)+2H2O(l)

**Further maths**

The first thirdd and ninth terms of am AP are the first three terms of a GP. If the seventh term of AP is 14, calculate (a) the 20th term (b) the sum of the first twelve terms of the GP

**Algebra**

The second side is 10 more than the third side and the first side is 6 less than the third side. What are the sides of the triangle if the perimeter is 64yd?

**Algebra**

The first side is triple the second side and the third side is five times the second side. What are the sides of the triangle if the perimeter is 72ft?

**science-college physics**

I donot understand a thing..

**life orientation**

how did social,physical, economic consequences corruption and fraud impact negatively in the country?

**Math**

A set of data is in the ratio of 2:3:5:6. If the largest number in this data set is 42, what is the range of the set of data?

**Math**

The bases of a triangular prism are equilateral triangles. The surface area of the prism is 80 square units. If the area of one of the triangular bases is half the area of one of the rectangular faces, what is the area of one of the triangular bases of the prism?

**chem**

A gas has a pressure of 5.7ATM at 100.0 C what is the pressure at 20.0 C? (assume voulme is unchanged)

**Drama**

I know this answer because I was int he play, "The Christmas Carol". It could be 1 or 4, but he had a cold heart so the answer is VERY likely to be 4. However may I ask you why you asked this question on a homework site?

**History**

Thank you so much Ms. Sue!

**History**

I couldn't seem to find any way to dot that.

**History**

Is there any way to compare and contrast the Progressives and Socialists from World War One?

**science**

When you say "The number of loops" do you mean the electric current? If that is what you mean, then yes, because the electric current is what increases the strength of the magnet. The more loops it has,the stronger the magnet will be, because magnetic objects would ...

**History**

Thank you that helped quite a bit. :)

**History**

I was wondering if anybody could give me a few examples of what Minnesotan's did to contribute to World War 1. If you could help me that would be great. Thank you!

**History/ Social Studies**

Thank you!!!!!!

**History/ Social Studies**

I was wondering if anybody could help me with this: Which of the following most directly involved the United States in World War 1? 1. The invasion of Russia 2. The German sinking of an ocean liner 3. The assassination of Archduke Franz Ferdinand 4. The alliance between ...

**History/Social Studies**

Thank you guys so much!

**History/Social Studies**

I was wondering is someone here could help me. I need to know what the Morris Act is, I'm not sure, and I couldn't find it on the internet. Please help me. Thank you!

**Health**

I did the took the test, and the correct answer is the epiglottis, I had originally used Esophagus but it was Epiglottis.

**Bio**

Analogous structures occur in nature because the animals with those structures have evolved. For example, the bird and the bee both have wing for the same purpose, but their wings do not have the same structure. These two organisms have adapted in the same way, in this case, ...

**algerbra**

which equation would you use to find out if the two lines in the graph are parallel

**Science**

If a dune moves 40m a per year, how far does it move in 1 day

**math**

you went to lunch with your friend and the bill was$ 27.00. your lunch is $8.00 more than your friend's. How much was your friend's lunch?

**Math**

Barb is making a bead neaklace. She strings 1 white bead,then 3 blue beads,then 1 white bead,and so on. Write the numbers for the first eight beads that are white. What is a rule for the pattern?

**Geometry**

A ship is 750 meters from a light house which is 50 meters tall. What is the angle of depression from the top of the lighthouse to the ship?

**Math**

An owner of a company spends $25 on office supplies. The owner is left with $20. Write an equation to find how much money he originally had.

**MATH**

hi i need help: explain how using a spinner would help find the experimental probability that a soccer player will score a goal on a penalty kick. Suppose the player makes 75% of his of his penalty kicks.

**science**

ummmm we need a picture please

**math/ pre algebra**

It gives you the total amount of miles traveled: 243 mi. In order to find out how many miles she traveled on the last day, you need to subtract the milage from the other two days: 243 - 67 - 92 = 84 mi. Lydia traveled 84 mi on the last day. In she rode for 7 hrs then that ...

**Math**

1. Mark is 5 years younger than his 16 year old sister. What is Mark's age. Write in equation form. 2. Vinn works at the petshop for $11 per hour. How many hours did he work if he made $93.50? Write in equation form.

**Math**

618

**Maths**

A runner runs a 10 metre race, the runner runs according to the following rule: s = 0.2t(t - 5.1)(t - 9.1) Where displacement (s) is in metres and time (t) is in minutes. Calculate for the runner: their starting position any changes in direction over the race (when and where ...

**Maths**

Three runners run a 10 metre race. Each runner runs according to the following rules: Runner 1: s = 2.4 + 0.75t Runner 2: s = 0.2t(t - 5.1) Runner 3: s = 0.2t(t - 5.1)(t - 9.1) Where displacement (s) is in metres and time (t) is in minutes. Calculate for each runner: their ...

**Math**

5,000 regroups into 49910. This is because you cannot subtract 2,896 from 5,000, at least not easily, so you take 5,000 cross off the 5 and make a 4. The 1,000 that you took away replaces the first 0 with a 10, then you cross of the 10 and put a 9, the 100 goes to the second 0...

**math**

I am having trouble and I would really appreciate if I could get some help. I am suppost to write a multiplication combination of 180 and 210. Thank you <3

**Trigonometry**

1.67 miles

**math**

what is the Lateral area of the face of a rectangular pyramid with measurements 2.5 in by 2.75 inches by 2.75 inches.

**algebra**

brittany wrote a computer program that generates two random numbers between one and eleven when she runs t what is the probability that the first value will be more than 9 and the second will be less than 3

**Math**

Can you help me to understand the meaning of reduction?

**Math**

Thanks i understand the question now.

**Math**

Whole numbers, rational numbers and irrational numbers.

**Math**

Can you please explain.

**Math**

Which set of best describes the numbers used on a scale for a standard thermometer? A.whole numbers B.rational numbers C.real numbers D.integers I choose Real Numbers if I am incorrect can you explain why.

**MAT 142**

What is the cost of concrete for a walkway that is 15 feet long, 8 feet wide and 9 inches deep if the concrete costs $30 per cubic yard?

**science PLZ HELP**

The correct answers are: 1. a 2. b 3. a 4. b 5. c 6. c 7. a 8. b 9. c 10. a 11. b 12. a 13. b 14. true I promise these are correct. I took the test. Hope this helps!

**algebra**

18/60

**math**

To needs to cut strip of wrapping paper that are each 9 inches wide.If TV has 2 rolls of wrapping paper that are each 15 feet long,how many 9 inch strips can he cut?

**Science**

I got a 100 thx Nicholas!

**Math**

Yes it is C

**Chemistry**

For the reaction 4FeCl2(aq) + 3O2(g) → 2Fe2O3(s) + 4Cl2(g), what volume of a 0.650 M solution of FeCl2 is required to react completely with 8.58 × 1021 molecules of O2?

**math**

There is a slide in the park that is 18 feet long. The ladder to the top of the slide is 7.5 feet long. If the ladder and the slide are perpendicular, what is d, the distance from the top of the slide to the ground? If necessary, round to the nearest tenth

**math**

Lucy has 40 bean plants,32 tomato plants,and16 peppers plants.She wants to put the plants in rows with only one type of plant in each row.All rows will have the same number of plants.How many plants can Lucyput in each row

**Math**

1333/5280 because you would take the depth and then divide it evenly among the 5280 to get the amount of miles and then your answer would come out as .25 if you round to the hundredth otherwise .252462121 Hope that helps!

**trig**

an observer at A looks due north and sees a meteor with an angle of elevation of 70 degrees. At the same instant, another observer 30 miles east of A seed the same meteor and approximates its position as N 50 degrees W but fails to note its angle of elevation. Find the height ...

**maths**

40-5+70-6=?