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Rachel

Questions (979)

users whose names start with R
1. 1 answer
2. 4 views
Round to the underlined place.18,904 A. 18,000 B. 19,000 C. 20,000 D. 18,900
1. 0 answers
2. 96 views
How did the last ice age affect human migration?A. It created land bridges where ocean had once been. B. It required people to
1. 1 answer
2. 250 views
A number is between 50 and 70.It can be divided by 3 and 7. It is also a multiple of 9.
1. 1 answer
2. 123 views
Which of the following could interrupt a sentence in between the subject and the verb
1. 0 answers
2. 125 views
Determine the limiting reagent for a given quantity of an acid and a base
1. 1 answer
2. 168 views
What is the basic unit of chemistry?
1. 1 answer
2. 122 views
a town Y is 200km from town X in a direction 40°.How far is Y east of X
1. 1 answer
2. 222 views
A bond is guaranteed to pay a continuous income of 100 + 10t dollars per year over 10 years. Assuming a continuous interest rate
1. 1 answer
2. 475 views
Find the present and future values of a constant income stream of $6700 per year over an 8-year period at an interest rate of
1. 0 answers
2. 465 views
To produce espressos, a coffee shop has fixed costs of 200 dollars each day and variable costs of one dollar per espresso. The
1. 2 answers
2. 411 views
The velocity of a car (in miles per hour) is given by:v(t)=36t−9t2 where t is in hours. Write a definite integral for the
1. 1 answer
2. 242 views
Your velocity is given by v(t)=2t2+5 in m/sec, with t in seconds. Estimate the distance, s, traveled between t=0 and t=8. Use
1. 1 answer
2. 528 views
According to the Protestant missionaries to the Pacific Northwest, what did the Native Americans need to do to become Christian?
1. 2 answers
2. 851 views
Why did most settlers take farm animals along the Oregon Trail? (1 point)
1. 8 answers
2. 1,291 views
The total profit (in dollars) from the sale of x answering machines isP(x)=20x−0.7x2−280. a. Find the exact profit from the
1. 1 answer
2. 476 views
Suppose the cost function for producing gadgets is C(q)=0.05q2+3q+48.a. At what production level is the maximal profit achieved
1. 1 answer
2. 363 views
If h= 65 tan theta, what is the approximate change in h when theta changes from 60° to 60° 03'?
1. 1 answer
2. 170 views
Mr.Deni’s class is having a pizza party. He buys 7 pizzas for the party. Each pizza has 8 slices. How many slices are there
1. 0 answers
2. 372 views
Can someone solve this for me?10.0mL of 0.10M HCl is added to a 100.0 mL of a 0.10M solution of NaCO2H (sodium formate). What is
1. 1 answer
2. 293 views
What are the answers to these 2 chemistry problems?1. At a certain temperature, the solubility product constant* of copper (II)
1. 1 answer
2. 319 views
when potassium permanganate KMnO4- react with thiosulfate S2O32-what is their oxidation and reduction half equation?
1. 1 answer
2. 377 views
Phosphoric acid is a triprotic acid:H3PO4(aq) +H2O(l) ↔ H3O+(aq) + H2PO4-(aq) Ka1 = 7.5 x 10-3 H2PO4-(aq) +H2O(l) ↔ H3O+(aq)
1. 1 answer
2. 676 views
Write an expression for the area of the shaded region and explain how the diagram shows your expression.A big square that is
1. 1 answer
2. 754 views
Solve the following equation for tc=a(8−e^bt) i got: ln-(c-8a)/a/b.......???? thank you so much
1. 1 answer
2. 154 views
After planting, a certain tree grows according the model below, with t in years and the height h in feet.h(t)=5(19−5e^−0.52t
1. 1 answer
2. 335 views
Find the exact solution and estimated solution to the equation using natural logarithms. If there is no solution, enter DNE in
1. 1 answer
2. 309 views
I posted this before but no matter what I'm putting in it says wrong.Oobleck, could you look at it PLEASE. the question is
1. 1 answer
2. 236 views
Express as sums, differences, and multiples of logarithms. Expand as much as possible.ln(x^14 √x+15)/√(12x−2)^15) this is
1. 1 answer
2. 397 views
What is the pH?Calculate the pH of 0.167 M NaC2H3O2 (sodium acetate) C2H3O2-(aq) + H2O(l) ↔ HC2H3O2(aq) + OH-(aq) Ka for
1. 6 answers
2. 631 views
calculate the molar mass of a compound if .279 mole of it has a mass of 413 gI got 1480 thanks
1. 1 answer
2. 262 views
calculate the number of moles of chloroform CHCL3 in 221 g of chloroformI got...1.851 moles thanks
1. 1 answer
2. 298 views
calculate the molar mass of a compound if .279 mole of it has a mass of 413 gi got 1480 thanks
1. 1 answer
2. 238 views
how many molecules of ethane c2h6 are present in .257 g of C2H6?thank you i got 5.14 x10^21
1. 2 answers
2. 263 views
Express as a single logarithm. Simplify as much as possible and do not leave any negative exponents. Only use parentheses, never
1. 1 answer
2. 348 views
Solve the following equation for the exact value of x. If there is no solution, enter DNE. If there is just one solution, enter
1. 2 answers
2. 375 views
Write the quadratic function (or one possible quadratic function) in vertex or standard form, from the following informationzero
1. 1 answer
2. 334 views
4/-3iwhy is the answer a positive number 4/-3i *3i/3i = 12i/9 = 4i/3 or 4/3i why isn't it 12/-9i? thank you
1. 1 answer
2. 193 views
you answered this and I thank you:"the zeroes mean that y = a(x)(x-7) since it opens downward, a must be negative so, a = -1 is
1. 2 answers
2. 324 views
Write the quadratic function (or one possible quadratic function ) in vertex form or standard form, from the following
1. 2 answers
2. 352 views
A sample of plutonium-240 decays according to the modelN(t)=23.89e−0.000106t where N(t) is the amount remaining in grams and t
1. 1 answer
2. 266 views
Find the inverse function g−1(x),its domain and its range for g(x)=40x^2−24, x≥0 can u explain it in baby talk..lol..I
1. 1 answer
2. 254 views
Consider 1.30 mol of carbon monoxide and 2.30 mol of chlorine sealed in a 6.00 L container at 476 oC. The equilibrium constant,
1. 2 answers
2. 496 views
Can someone help me with this question?For the reaction: 2HI(g) ↔ H2(g) + I2(g) Keq = 0.016 Initially, a container contains
1. 1 answer
2. 528 views
Point B (5,2) is located on AC such as that AB is ¼ of AC. Find the coordinates of point C if point A is located at (7,4).After
1. 2 answers
2. 309 views
In a science class of 120 student ,56 passed physics,61 passed chemistry ,60 passed biology,20 passed both physics and chemistry
1. 3 answers
2. 905 views
A body of mass 4.2kg moving with velocity of10m/s due east collides with stationery body of mass 2.8kg.If they stick together
1. 1 answer
2. 497 views
Find the length of the tropic of Capricorn, latitude 23.5
1. 1 answer
2. 1,026 views
How does birth rate affect per capita growth rate?Thanks!
1. 0 answers
2. 206 views
What mass of benzoyl peroxide is present in 150g of an acne solution with a 5.0% M/M benzoyl peroxide concentration?A) 7.5g B)
1. 1 answer
2. 1,740 views
What volume of a 2.50% M/V glucose solution can be prepared using 250g of glucose?A) 1.0L B) 100.0mL C) 10.0mL D) 10L
1. 2 answers
2. 929 views
Which of the following statements about the dissolving process is accurate?A) For a substance to dissolve, solute-solvent
1. 1 answer
2. 1,388 views
In a class, 12 students like to play volleyball. If 30% of the students in the class like to play volleyball, how many students
1. 1 answer
2. 966 views
Language Arts 7 A / 4. Focusing on an Objective / 4.2. Writing an Analysis: Pre-WritingJump to: Target due: Last Friday Please
1. 9 answers
2. 1,363 views
What determines a trait of an organism?a. the number of copies of the gene b. the combination of it's alleles c. it's phenotypes
1. 1 answer
2. 1,966 views
He had only gone a few steps when he heard some one calling him from behind...a. a description of everyday life b. a character
1. 1 answer
2. 444 views
Underline the correct pronoun from each pair parentheses and identify its use in the sentence as subject, predicate nominative,
1. 0 answers
2. 514 views
C 2,9 . D -2,-9
1. 1 answer
2. 174 views
A 0,0 ,b 0,10
1. 1 answer
2. 163 views
Solving Linear Equations
1. 2 answers
2. 456 views
Madison pushes with a 150-N horizontal force on a 10-kg crate of coffee resting on a warehouse floor. The force of friction on
1. 1 answer
2. 422 views
create a quintic polynomial inequality for which x=-4, x=0, x ≥ 2 is the solution. Justify your answer by solving the
1. 1 answer
2. 1,659 views
Consider the polynomial function P(x) = -x^3 - mx^2 + nx - 5m. The remainder when P(x) is divided by (x-2) is 1 and (x+1) is a
1. 2 answers
2. 2,009 views
Marianne and faith are upgrading the storage shed in their backyard. the existing shed has the shape of a rectangular prism with
1. 1 answer
2. 709 views
Unity Games is a company that sells video games. Its revenue last year was modelled by the function g(x)=-4x^4+6x(4x-1)-4 and
1. 1 answer
2. 1,025 views
Shirley is a successful lawyer. She is now working in a renowned law firm. She has a lot of customers and her daily schedule is
1. 0 answers
2. 489 views
"Cart 1 has a mass of 2.8 kg and is moving with a velocity of 6.6 m/s[right] along a frictionless track. Cart 2 has a mass of
1. 2 answers
2. 507 views
If an angle is 41.4 degrees, what is its compliment (in other words, what is its complimentary angle)? What is its supplementThe
1. 3 answers
2. 1,024 views
A swimmer wishes to swim directly across a river that has a current of 2.5m/s. He can swim 3.5m/s in a pool. Include a diagram.a
1. 1 answer
2. 1,204 views
Find the limiting reactant for each initial amount of reactants in the following reaction: 2Na(s)+ Br2(g)→2NaBr(s) A: 5 molNa
1. 1 answer
2. 3,065 views
What is the minimum amount of 6.3 M H2SO4 necessary to produce 27.7 g of H2 (g) according to the following reaction?2Al(s)+3H2SO
1. 1 answer
2. 791 views
Over the last 50 years, the average cost of a car has increased by a total of 1,054%. If the average cost of a car today is
1. 1 answer
2. 2,155 views
Suppose the price of a $185 item increases by 11.7%. By what percent does the resulting price have to decrease in order for the
1. 1 answer
2. 599 views
If our recipe calls for 2 1/2 cups flour for every 3/4 cup sugar,how much flour is needed if we used 1 cup of sugar?
1. 4 answers
2. 2,449 views
what was the reason of the first crusades?A.the pope called for the destruction of the eastern Orthodox church at Constantinople
1. 3 answers
2. 821 views
How fraud and corruption affects the offender's career
1. 1 answer
2. 435 views
1) The position vectors of A and B are OA= -i+2j+k and OB = i+bj+k respectively.a) Find ,in terms of b, the unit vector in the
1. 1 answer
2. 692 views
A mixture of 0.5 mole of ethanoic acid and 1 mole of ethanol was allowed to reach equilibrium at room temperature. The
1. 1 answer
2. 1,445 views
Discuss the consequences, both positive and negative, that industrialization had on the growth of cities, immigrants, and the
1. 1 answer
2. 618 views
What is the unknown digit that will make this problem true3.59>3.5
1. 1 answer
2. 444 views
Three vectors are shown in the figure. Their magnitudes are given in arbitrary units. Determine the sum of the three vectors.
1. 5 answers
2. 7,182 views
If it is 5° outside and the temperature will drop 17° in the next Six hours, how cold will it get?
1. 2 answers
2. 919 views
Your current cell phone company charges $30 per month for unlimited texting. Another company charges $20 per month for the first
1. 1 answer
2. 880 views
Can someone help me on how to do this without a calculator.It would really help me out thanks The problem is below An item on
1. 3 answers
2. 541 views
A reaction of 48.5 g of Na and 53.7 g of Br2 yields 55.4 g of NaBr. What is the percent yield?2Na+Br2 2NaBr
1. 1 answer
2. 512 views
determine how many grams of N2 are produced from the reaction of 8.75 g of H2O2 and 5.43 g of N2H4.2H2O2+N2H4 4H2O+N2 g N2?
1. 3 answers
2. 1,046 views
Solve the following system of equations:4x+y–2z=10 2x–y+2z=–9 x+y+z=6
1. 2 answers
2. 441 views
Determine whether QS || PT . Justify your answer.PQ = 18, QR = 6, RS = 12, ST = 36
1. 1 answer
2. 1,166 views
Find x so that QS || PTPQ = 8, QR = 5, RS = 15, ST = x + 3
1. 1 answer
2. 2,185 views
A company makes batteries with an average life span of 300 hours with a standard deviation of 75 hours. Assuming the
1. 1 answer
2. 808 views
Complete two column proof.Given: x/6+2=15 Prove: x=78 x/6+2=15 A:______ x/6=13 B:______ x=78 C:_______ A:a. Given b. Subtraction
1. 1 answer
2. 2,505 views
im not sure if my question posted before because it isn't showing up when I look for itIn /\PRS, segment PT is an altitude
1. 1 answer
2. 484 views
Matching: The segments used in reference to the triangle vs. concurrent point. Write the correct letter bythe word. 1. Altitudes
1. 1 answer
2. 685 views
In PRS, segment PT is an altitude and segment PX is a median.Find RS if RX = x + 7 and SX = 3x – 11 Find RT if RT = x – 6
1. 0 answers
2. 637 views
In ABC, segment BF is the angle bisector of ABC, Segments AE, BF, and CD are medians, and P isthe centroid. Find x if DP =
1. 1 answer
2. 1,270 views
In ABC, segment BF is the angle bisector of angle ABC, Segments AE, BF, and CD are medians, and P isthe centroid.
1. 2 answers
2. 678 views
In a random sample of 200 students who were asked their favorite color, it was foundthat twenty more students liked blue than
1. 0 answers
2. 542 views
Given: measure of angle D=~ measure of angle F ;line GE bisects angle DEF Prove: line DG=~ line FG =~ is the congruent sign
1. 0 answers
2. 518 views
The Haber process developed to produce fertilizer from nitrogen and hydrogen, is governed by the following unbalanced reaction:a
1. 1 answer
2. 994 views
Given the function f(x) = x2– 3x + 3, find the following:f(-2) = _________ f(5) = _______
1. 1 answer
2. 383 views

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