# Questions Asked onJanuary 12, 2019

1. ## Social Studies

One cause of the outbreak of World War I was caused by?

2. ## maths

calculate differentiation of cos x to x using first principle of derivative. Find the value of differentiated function , if x = 270°

3. ## Calculus

Use two rectangles of equal width to estimate the area between the graph of f(x) = x - cos(πx) and the x-axis on the interval [1, 5]. Evaluate the function at the mid-point of each rectangle to find each height. a) 8 b) 12 c) 16 d) 20 thank you in

4. ## math

it takes 3 hours for 10 pumps to pump 40000 liters of water into a farm dam . How long will it take 9 similar pumps to pump 60000 liters of water into the dam?

5. ## Algebra

Prove if the given functions are inverses by evaluating the composition f(h(x)) or h(f(x)) g(x) = -(4/-x-3) +1 f(x)= (3/-x-1) -2 How do we go about once we for example plug in the first expression into x in the second expression, in terms of what to do

6. ## Math

Which of these expressions is equivalent to x^4–16? (x^2+4)(x–2)(x+2) (x^2–4)(x^2–4) (x+2)(x–2)(x+2)(x–2) (x^2–2)(x^2–2) I know it is not B or D. But I am not sure if it is A or C. Please help

7. ## math

Consider a particle moving along the x-axis where x(t) is the position of the particle at time t, x' (t) is its velocity, and x'' (t) is its acceleration. x(t) = t3 − 12t2 + 21t − 9, 0 ≤ t ≤ 10 Find the open t-intervals on which the particle is

8. ## History

Why did the United States become involved in Mexico civil war

9. ## Calculus

Express the sum using sigma notation 1+ 5/6+ 6/8+ 7/10 + 8/12

10. ## Physics

Hi, A squash ball of mass 0.035 kg hits the wall at speed of 78 m/s and rebounds straight back at 61 m/s. The ball is in contact with the wall for 0.44 s. a) What is the original momentum of the squash ball? 2.73 kg-m/s b) Calculate the impulse imparted to

11. ## Algebra

What is the property of this equation? -3(x+4)=-3x-12 Distributive Property Associative Property of Addition Associative Property of Multiplication Commutative Property of Addition

12. ## Calculus

Find the antiderivative of e^(2lnx) + e^(2x)

13. ## algebra

Which equation is the standard form of −56x+14x^2=−51? 14x^2−56x+51=0 14x^2+51−56x=0 −56x+14x^2−51=0 14x^2−56x−51=0 I do believe it is A or D, is one of these correct?

14. ## Chemistry

An industrial raw materials as the following composition by mass : iron = 28.1% chlorine = 35.7% and water of crystalization = 36.2%. Calculate the formula for the material given that Hydrogen is 1, oxygen is 16, chlorine is 35.5 and iron is 56.

15. ## math

ways decimals are in everyday life

2/3 x=1 1/2

17. ## Math

Can someone please help me I don't understand this question. The base of a rectangular prism has an area of 1/8 ft2, and the height of the prism is 2/3 ft. What is the volume of the prism?

18. ## Math

Log6 1296 3 4 -4 6

19. ## math

A number multiplied by 12 is equal to the sum of the square of that same number and 36. What is that number?

20. ## algebra

Look at the system of equations below. If you were to substitute the first equation into the second, what would the result look like? y = 2x - 4 x - 3y = 7 a).2x - 4 - 3y = 7 b).x - 3(2x - 4) = 7 c).x - 2x - 4 = 7 d).x - 7 = 2x - 4 I really need help with

21. ## Math

For what values of k will lim as x approaches 3 (x-3) / (x^2-6x+k)

22. ## Social studies

Which of the following arguments could have been used to support the US acquisition of Puerto Rico Guam in the Philippines

23. ## algebra

Which of these expressions is equivalent to z^8–1? (z^4+1)(z^2–1)(z–1)(z–1) (z^4–1)(z^2–1)(z–1)(z–1) (z^4+1)(z^2+1)(z+1)(z–1) (z^4+1)(z^2+1)(z–1)(z–1) I Think it is either A or C, is one of these correct?

24. ## Math

If on a scale drawing 100 feet are represented by 15 inches, then a scale of 1/2 inch represents how many feet?)

25. ## Math

Write the equation for the parabola that has x− intercepts (1.2,0) and (4,0) and y− intercept (0,12).

asked by ( ͡° ͜ʖ ͡°)
26. ## math

Find f(x) if it is known that f(x+3)=4x+12

27. ## math statistics

IQ scores in the US population have an average of µ = 100 and a standard deviation of σ = 15. Suppose a researcher wanted to test whether socioeconomic status (SES) has an effect on IQ scores. The researcher takes a random sample of n = 100 people,

28. ## Math

Find all vertical and horizontal asymptotes for the graph of y=lnx/lnx-1

6/5 ÷ ◻️ = 6

30. ## language arts

what are the key characteristics of a refrain in poetry?

31. ## Social studies

How did yellow journalism create support for the Spanish American war where is it by writing articles about the political pull up popularity of President McKinley McKinley already are articles about the effort of the United States to control Cuba by

32. ## Maths

In how many ways can 5 boys and 4 girls be arranged on a bench if (a) a boy and a girl wish to stay together (b) 2 boys wish to stay together (c) 2 girls wish to stay together

33. ## science

a conductive sphere of radius r in space of electric potential v give the expression of the charge

34. ## Math

Definition of Derivative Question lim as h approaches 0 square root of (16+h) - 4 / h

35. ## Calculus

Find f'(0.5) for f(x)=f on the top "x" on the bottom "0" Arc tan(t)dt

36. ## Math

What is the slope of the tangent for the function h(x)=sin(e^-lnx) at x=1/pi

37. ## calculus

Determine whether y is differentiable at x=0 . If it is differentiable, find the derivative at x=0 . y = {x if x0} y' = ( 1 if x0) Yes , it is differentiable at 0. Is the derivative at x=0, 1?

38. ## Maths

The product of two numbers is 21 and their sum is 10, what are the numbers

39. ## Math

A study is planned to compare the blood pressure lowering effect of two medications (drug A and B) in patients with elevated systolic blood pressure. Drug A is a newly developed medication lowering the elevated SBP and drug B is a commonly prescribed

40. ## Calculus

Find the value of f on the top "9" on the bottom "1" x^2dx using four rectangles of equal width, with each left end-point used to find the height of each rectangle. a) 2(1+9+25+49) b) 2(9+25+49+81) c) 0.5(1+9+25+49) d) 0.5(9+25+49+81)

41. ## Maths

Solve the following pairs of equation x-3y is equal to 1

42. ## math

1.A square lot is to be planted with santan plants all around.The side of the lot measures 10 m.If plants will be planted 20 cm apart,how many plants must be planted in all?

43. ## Social studies

How do yellow journal nice create support for the Spanish American war

44. ## math

boat travels 280 m in a time of 120s. WHAT IS THE BOATS VELOCITY

45. ## math

the cost price of16 books is equal to the selling price of 30 books.Find the gain%?