# Posts by RJ

Total # Posts: 75

math
418

math complex number
yes, and it is 0.6202∠-172.87 in polar form

Chemistry
The velocity of an enzyme catalyzed reaction was 10% of Vmax at 2.0 μM substrate concentration. What was the Km in μM? I know Km=1/2Vmax but I do not know if this is the right equation to use or if I am incorporating the known substrate concentration right? I tried ...

geometry
The side of a triangle opposite the right angle is equal to ______. a. one of the other sides a or b b. a+b c. O(a^2+b^2) d. None of the above

Social Studies
Koop is real is 100%right for Oregon connections academy👌

Calculus
A=The area of the horizontal cross section: A(y)=sqrt(3)/4*a^(2) a/(h-y)=s/h --> a=(h-y)(s)/(h) The height for a tetrahedron is: h= sqrt(2/3)(s) --> sqrt(2/3)(7) = 5.7154 a=(h-y)(s)/(h) -->(5.7154-3)(7)/(5.7154) = 3.3257 A(y)=sqrt(3)/4*a^(2) --> sqrt(3)/4*3.3257^(2...

Science
no number 3 is a

MATH
How do you find the base area of a rectangular prism if you know the volume and the height

psych
idk nga

math
10 2/9-(-3 1/3)

S.S. help plz
hes right

Math
move the 15 to one side then move the 2.8 to the other then divide out and solve for x. x = 24

math
Rents a van at daily rate of \$19.95 plus .39/mile, another company will rent same van for \$39.95 plus .29/mile. for what mileage are the costs the same?

math
25/11 + 2y = 3 Subtract 25/11 from both sides How do subtract this fraction from 3?

math
2y = 4/3 simplify

Spanish
Verb Distinction Give the correct form of the appropriate verb, saber or conocer, which would be used in writing the following sentences in Spanish. Be sure the verb is written in correct form to agree with the subject of the sentence and also in the correct tense (past or ...

foundations of math
simplify 10(-3a+3b-3c)-8(4a-6b+3c)

A grocery store shelf can hold 4 large boxes of laundry detergent. The store clerk put 25 boxes of laundry on the shelves. What is the least number of shelves needed for the display.

School
Thanks, Ms. Sue!!

maths
180-50-50=80

Physics
Did you find an asnwer

algebra
given the quadratic function f(x) 4x^2 -24x +36 find the value of x such that f(x)=4

Physics
A very strong 100kg man is having a tug-of-war with a 1500kg elephant. The coefficient of static friction for both on the ground is 0.9. Find the force that would be needed to move the elephant.

programming
Prompt the user to enter a number of seconds. Return to the user the hours, minutes and seconds.Example: Enter seconds: 1000 1000 seconds = 0 hour, 16 minutes, 40 seconds Hint: use the modulus operator.

Chemistry
20 000 J

Math
Find the average ordinate for y=x^2 from x=0 to x=6

MATH
c=(p*5)+24 p is the dependant

Math
Find the value of the derivative of y=sin^2(0.25x^4) at the point (ð,0.17)

This is how the solution is reached: Centripital acceleration = radius x (angular speed)^2 The acceleration of A = 2.8 (the acceleration of B) So to set it up we get: Sqrt(L2^2+L1^2) w^2 = 2.8 (L1) w^2 The angular velocities cancel because they are equal. Now square both sides...

Chemistry - Quantitative analysis
Thank you DrBob222!

Chemistry - Quantitative analysis
A mixture weighing 7.290 mg contained only cyclohexane, C6H12 (FM 84.159), and oxirane, C2H4O (FM 44.053). When the mixture was analyzed by combustion analysis, 21.999 mg of CO2 (FM 44.010) were produced. Find the weight percent of oxirane in the mixture.

Physics
An arrow is shot at a 30.0° angle with the horizontal. It has a velocity of 49 m/s. (a) How high will the arrow go? m (b) What horizontal distance will it travel? m

Body Structure and Function
Conductivity is the ability of a neuron to react to stimuli? True or False

Education
ok thank you for the help.

Education
MS. SUE can you please see if these answers are correct. I would greatly appreciate it. Thank you Which of the following statements best describes the instructional level achieved in an Informal Reading Inventory a. the student is unable to read a text b. the student can read ...

Education
I would then say B or even D all of them depending on what they are teaching

Education
I wasn't sure what theme studies are? that's why I asked this question

Education
Theme studies are especially effective for English language learners because: a. they organize information; b. they provide a meaningful learning context; c. they help students with their reading; d. all of the above.

Education
Yes we learn from all those things but there is not all of the above answer?

Education
Well I thought the first one was A. and the next one was D. all of the above. Is that right?

Education
Most of the vocabulary students will acquire throughout a school yearwill be through: a. lessons you have taught throughout the school year; b. classroom reading and self-selected reading; c. specific strategies you've taught throughout the year; d. none of the above ...

Education
Which of the following would you want to evaluate for a middle school student? a. background knowledge b. word recognition and vocabulary knowledge c. comprehension d. all of the above

Education
Which of the following would you want to evaluate for a middle school student? a. background knowledge b. word recognition and vocabulary knowledge c. comprehension d. all of the above

Education
Writing process teaching strategies used with first language learners are: a. the same for first and second language writers b. effective for second language learners with some modifications c. effective for first language learners only d. effective for language learners when ...

Education
Which of the following statements best describes the instructional level achieved in an Informal Reading Inventory a. the student is unable to read a text b. the student can read a text without much assistance c. the student can read a text with assistance d. the student can ...

MATH
CALCULATE THE AREA FOR THE FIGURE WITH SIDES 9YDS 6YDS 6YDS 6YDS 3YDS 12YDS

Math
A triangle whose sides are 5, 12, and 13 inches is similar to a triangle whose longest side is 39 inches. What is the perimeter of the larger triangle?

Math
7+7

physics
What is the magnitude of the apparent weight of a 79 astronaut 5200 from the center of the Earth's Moon in a space vehicle moving at constant velocity?

soil mechanics
a. 15.4% b.2038.5 kg/m^3 c.1766.5kg/m^3

algebra
2. Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are \$3000 for setup costs and \$2.00 to administer each test. e. How many animals should be tested for the average cost to be \$5.00 per animal?

Science
A plastic block has sides that measure 4 centimeters, 2 centimeters, and 3 centimeters. Its mass is 19.2 grams. Predict whether the block will float in water. Will it float in olive oil?

Science
• Describe forces resulting from natural phenomena that can have severe consequences on structures in the environment and identify structural features that help overcome some of these forces

stats
.06

Physics
Two stunt drivers drive directly toward each other. At time t=0 the two cars are a distance D apart, car 1 is at rest, and car 2 is moving to the left with speed v_0. Car 1 begins to move at t=0, speeding up with a constant acceleration a_x. Car 2 continues to move with a ...

writing
Is there someone who could proofread this? Identify the sentence patterns 1. He followed the map to the treasure. S/V/DO 2. Darcy sang the song slowly. S/V/DO 3. They were certain about the time. S/LV/SC 4. I called him a sucker. S/V/DO 5. I found the puppy a home. S/V/DO 6. ...

accounting
You are provided with the following information for Pavey Inc. for the month ended October 31, 2008. Pavey uses a periodic method for inventory. Date Description Units Unit Cost or Selling Price October 1 Beginning inventory 60 \$25 October 9 Purchase 120 26 October 11 Sale 100...

Physics
hey what is the formula for cw,Cc, and Calum plss answer it plss

math
the ? says "find the 10th term of the sequence" 5n+3 Would I do 5(10) +3 and get 53 as the answer? Am I doing this correctly? Thank you for your help.

math
the ? says "find the next 2 terms of the sequence. 1. 3n+1 2. 4n-2 How do I figure out what the next terms are?

5th grade - Math
Thank you, I was very confused on how to solve it.

5th grade - Math
If the retail tax rate is 5 cents for every 1 dollar you spend, how much tax would you pay for a \$0.15 item?

Algebra 1: 8th Grade
Yes. For example y = -999999x It will be very steep and negative.

geometry
Axiom

Math- Ideas only
I need some help on getting ideas for my limits & continuity calculus project! For the limits project: I have to conduct an "interview with a limit" (Q&A format).I have to include factual information like definitions, properties, theorems, etc. I also have to include...

math
14-9x = -80-8x Switch sides. x=94

12th AP Calculus
First you do powers. 3(csc(x))^1/2 Then trig. The final: -3(csc(x))^1/2 *(csc(x)cot(x))

Biology
One - monosaccharides. Starch is a carbohydrate made of glucose.

Calculus
I need some help on getting ideas for my limits & continuity calculus project! For the limits project: I have to conduct an "interview with a limit" (Q&A format).I have to include factual information like definitions, properties, theorems, etc. I also have to include...

English Essay Thesis
I think it's fine. But make sure you can support it in your body paragraphs, otherwise having such a complicated thesis is worthless.

math
if you are 25 and you get 25 dollars every 2 wks and at the end of the month 10% is added like interest how much would you get if you stopped at 65 years old.

Social Studies
how can i find out what day of the week December 19,1777 was

Calculus
How do we integrate 1/lnx.

Calculus
How do we integrate xlne^x .

PHYSICS
4.7 m/s is the correct answer.

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