Most popular questions and responses by Adrianna
1. ## inverse trig HELP PLEASE!!

Write the general solution to y = arcsin (0.6428). 40°±360°k 140°±360°k 220°±360°k 320°±360°k How do I find the right answer? I am like seriously stuck. I need help please.

2. ## Pre-Cal

Two airplanes take off from an airport at the same time. One travels on a heading of 45 at 420 mph and the other on a heading of 150 at 400 mph. After two hours, how far apart are the airplanes? A.650.66 miles B.1,160 miles C.1,301 miles

3. ## Calculus

Evaluate the Riemann sum for (x) = x3 − 6x, for 0 ≤ x ≤ 3 with six subintervals, taking the sample points, xi, to be the right endpoint of each interval and please explain, using a graph of f(x), what the Riemann sum represents. My cousin needs help

4. ## Science

While in Europe, if you drive 109km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 39.0mi/gal ? Assume that 1euro=1.26dollars .

5. ## Calculus

Hi it's me again I need help with this too and I promise to never use this site again! I feel so ashamed for asking :( Use the Fundamental Theorem to evaluate the integral from 0 to 3 of the quantity x cubed minus 6 times x, dx.The answer has to have the

6. ## Converting Polar Equations to Cartesian Equations

If theta= pi/3 , then to convert to a Cartesian equation, let x = A.(1/2)r B.(square root of2/2)r C.(square root of 3/2)r

7. ## Converting Cartesian Equations to Polar Equations

Convert the Cartesian equation x^2 - y^2 = 16 to a polar equation. r² = 16/cos2è r = -4 r² = 8 help please im stuck between 2 answers.

8. ## Pre-Cal

A pilot wishes to fly on course 290 with an air speed of 300 knots when the wind blows from 224 at 18 knots. Find the drift angle to the nearest hundredth of a degree. A.3.22° B.5.07° C.86.86° A river is flowing at the rate of 2.4 miles an hour when a

9. ## Math

A 3-pound pork loin can be cut into 10 pork chops of equal weight. How many ounces is each pork chop. Is my math correct? 3lb=48oz so 48/10=4.8 so is each pork chop, 4.8 os or do i have to divide 8 by 10?

10. ## Algebra

A nurse requires a 40% alcohol solution. The nurse has 20% and 70% alcohol solutions on hand. How many liters of each should the nurse use to make 25 liters of the 40% solution?

11. ## Chemistry

Calculate the pH of a buffer solution that contains 0.23 M benzoic acid (C6H5CO2H) and 0.28 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 10-5 for benzoic acid] Please help?

12. ## Chemistry

A pure sample of (R)-limonene has a specific rotation of +125.6. If a sample had a specific rotation of +35.6, how much of each enantiomer is present in the sample? Show your work. I don't even know where to begin....please help :(

13. ## english

Locate the participial phrase and the word modified. Approaching the curve, the car slowed down.

14. ## Chem

net ionic equation of aluminum hydroxide + sodium hydroxide

15. ## Physics

Suppose that when you ride on your 7.90-kg bike the weight of you and the bike is supported equally by the two tires. If the gauge pressure in the tires is 72.5 lb/in2 and the area of contact between each tire and the road is 7.13 cm2, what is your weight?

16. ## Chemistry Lab

So we prepared 100mL of .1M solutions of these solutions, and found the pH and H+ contents: pH H+ HCl: .57 .270 HNO3: .58 .260 H2SO4: 1.29 .051 HC2H3O2: 2.44 .0036 H2C2O4: .84 .145 HKC6H4(CO2)2: 4.13 7.41 Now I'm stuck on this question. What conclusions

17. ## Math

Use an example to describe the multiplicative relationship between two equivalent ratios

18. ## Equation from Three Points*HELP*

Write the standard equation for the circle that passes through the points: (0, 0) (6, 0) (0, - 8) You must include the appropriate sign (+ or -) in your answer. Do not use spaces in your answer. x 2 + y 2 x y = 0 HELP PLEASE I NEED STEP BY STEP

19. ## Exponential decay

Show that if a radioactive substance has a half life of T, then the corresponding exponential decay function can be written as y=y0e^kt

20. ## NEED MAJOR HELP! *QUADRATIC EQUATIONS*

Write the equation for the circle with center at (- 8, - 6) and radius of 10. (x+8)² + (y + 6)² = 10 (x+8)² + (y + 6)² = 100 (x-8)² + (y - 6)² = 100 Find the standard equation for the circle with center on the positive x-axis and passing through the

21. ## penn foster world history

see ive passed Foragers,farmers,and Builders (exam 007678) & The Axial Ages And Fitful Transitions (exam 007679) but i failed Contacts,conflicts,and The Crucible (exam 007680), Convergence,divergence,and Global Enlightenments (exam 007681), Frustrations Of

22. ## Chemistry

If 42 mL of Cr2O7-2(aq) solution is titrated to the endpoint with 172 mL of 0.15 M Cl-, what was the concentation of Cr2O7-2 solution? I got the reaction 14 H+(aq) _ Cr2O7-2(aq) + 6 Cl- = 2 Cr+3(aq) + 3 Cl2(g) + 7 H20(l) Now I have drawn a blank. Please

23. ## Math College

A 6-sided die is rolled 14 times. What is the probability of seeing a "6" at least 2 times? I am sooo clueless please help!

24. ## CALC

point on the hyperbola 9x^2−6y^2=10 closest to the point (0, 7). y coordinate of each point= ? positive x coordinate= ? negative x coordinate= ?

25. ## Chemistry

The compound A1B2 (molar mass = 132) has a solubility of 13 g/L. Calculate the Ksp for this compound. I'm stuck on this question, please help?

26. ## english

If you are very good with people, you have a high level of __________ intelligence.

27. ## Pre alegabra

There are 14 nickels, 10 dimes, 6 quarters, and 22 pennies, what's the probability I will pick a dime from the jar?

Growth potential and opportunity for a small cleaning service business

29. ## Arrays and an expanded algorithm

use the grid to draw a rectangle. Then complete the calculation. 30 x19

30. ## Pre-Cal

Find the distance from point (-1, 3) to the line 5x- 4y= 10.

31. ## math

my daughter is working on calculating how many triangles point up in equilateral triangle. This is her bonus question: solve this problem for an equilateral triangle with sides measuring n units each. I'm lost, help.

32. ## MATHS URGENT

The values for x when f(x) = 0 are: x=-2 and x=3 My question is: The function f(x) can be written in the form of a(x-p)(x-q)(x-r) Write down one possible set of values for p, q, and r? Now Ive got the correct answer x = -3, 2 and 2 Could you show me

33. ## Math

Not really understanding solving the formual for the indicated variable. Solve for b2 h/2(b1+b2)

34. ## Math

I need assistance with statistics and probability. Can you some how assist me with that.?

35. ## College Algebra

3x^4=648x someone help please im so confused. i am trying to find the solution set?

36. ## Chemistry

The half-life of the first order reaction, A to products, is 53.2 s. What was the original concentration, (A)0 in moles per liter, if after 1.8 minutes, the concentration of A is 0.0783 moles per liter? Not sure whether to use integrated rate law or half

37. ## chemistry

A certain monoprotic weak acid with Ka = 6.7 × 10-8 can be used in various industrial processes, but is no longer used in chemistry teaching labs because it tends to explode when it gets old. (a) What is the [H+] for a 0.558 M aqueous solution of this

38. ## english (debate)

hey im in the negative side.the topic is no homeworks on weekends and im the 3rd speaker it really sucks so can you guys help me

WRITING A BOOK REPORT WHAT IS THE IMPORTANT THING I SHOULD WRITE?

40. ## Maths (URGENT)

The values for x when f(x) = 0 are: x=-2 and x=3 My question is: The function f(x) can be written in the form of a(x-p)(x-q)(x-r) Write down one possible set of values for p, q, and r? Now Ive got the correct answer x = -3, 2 and 2 Could you show me step

41. ## Maths

The values for x when f(x) = 0 are: x=-2 and x=3 My question is: The function f(x) can be written in the form of a(x-p)(x-q)(x-r) Write down one possible set of values for p, q, and r? Now Ive got the correct answer x = -3, 2 and 2 Could you show me step

42. ## social studies

what is the national democratic convention?

43. ## social studies

What sailor provedthat Columbus did not reach Asia?

1. ## math

8 cups because 2/3 times x/12 you do cross multiplication you get 24 so to get rid of x you divide. So 24 goes into the house and 3 outside and you will get 8

posted on March 11, 2019
2. ## Math

You complete 3 centimeters of a necklace in an hour. Each hour after the first,you triple the length of the necklace. Write an expression using exponents for the length of the necklace after 3 hours.then the length.

posted on September 20, 2017
3. ## Algebra

n still​ water, a boat averages 9 miles per hour. It takes the same amount of time to travel 26 miles​ downstream, with the​ current, as 10 miles​ upstream, against the current. What is the rate of the​ water's current?

posted on June 16, 2017
4. ## LANGUAGE ARTS HELLPPPP!!!!!

LizLiz is 100% correct

posted on March 21, 2017
5. ## LA HELP/CHECK!

I took the test and theses answers are 100% correct 1 A 2 B 3 C 4 D 5 D 6 C 7 B 8 C Hope this helped :)

posted on March 20, 2017
6. ## math

1. D 2. A 3. B 4. A 5. C

posted on December 6, 2016
7. ## Science

The answers are A D D B I took the test and got 100%

posted on December 6, 2016
8. ## math

8267- 2761

posted on October 7, 2015
9. ## math

it think the answer is 2.1

posted on May 5, 2015
10. ## algebra math riddle...

How meny cattel are there on the lazy circle double-o bar four square ranch

posted on January 8, 2015
11. ## Algebra

Slope = -1.5

posted on March 21, 2012
12. ## NEED MAJOR HELP! *QUADRATIC EQUATIONS*

It probably would be easy, but I don't have a teacher teaching me this. I do all my school work online and I just need this class to finish and graduate.

posted on March 20, 2012
13. ## Converting Cartesian Equations to Polar Equations

Thank you.

posted on March 20, 2012
14. ## Pre-Cal

thanks

posted on March 17, 2012
15. ## Pre-Cal

Yes I am, but I don't understand it. I don't have a teacher to teach me. I do my work online, and I just need 2nd semester of pre-cal to graduate.

posted on March 17, 2012
16. ## Pre-Cal

Can you tell me how you did it? I got 5 more questions like this one.

posted on March 17, 2012
17. ## penn foster world history

nope the town i live in is small, im actually like the only homeschooled child so nope we don't have any homeschool meetings...my materials get shipped to me from PA..i cant just like drop out from high school though...i have to finish this class...im

posted on October 7, 2011
18. ## penn foster world history

@writeacher im in the high school program, to get my diploma, trust me when im done i will not be taking college with this school :)

posted on October 6, 2011
19. ## Crossword Question

an objected created and? used by humans

posted on September 21, 2011
20. ## Crossword Question

the knowledge,beliefs,customs,and values of a group of people?

posted on September 21, 2011
21. ## Math

10.6 ft

posted on May 2, 2011
22. ## Chemistry

Thank you!

posted on March 23, 2011
23. ## Chemistry

Haha, yes Chemistry is just a bunch of fun. And yes, thank you that helps a lot!

posted on March 21, 2011
24. ## Chemistry

Oh, thanks! That was so simple! I'm a little confused on how to set up this question? A solution is prepared by mixing 535 mL of 0.30 M NaOCl and 494 mL of 0.26 M HOCl. What is the pH of this solution? [Ka(HOCl) = 3.2 × 10-8] Could you give me a hint?

posted on March 21, 2011
25. ## chemistry

Thank you so much!!

posted on March 7, 2011

x^2+4x+3

posted on March 4, 2010
27. ## Maths (URGENT)

The values for x when f(x) = 0 are: x=-2 and x=3 My question is: The function f(x) can be written in the form of a(x-p)(x-q)(x-r) Write down one possible set of values for p, q, and r? Now Ive got the correct answer x = -3, 2 and 2 Could you show me

posted on October 1, 2009