# Questions Asked onJune 17, 2020

1. ## Maths

An Aeroplane X Whose Average Speed Is 500km/h Leaves Kano Airport At 7:00am And Travels For 2 Hours On A Bearing 050 Degree. It Then Changes Course And Flies On A Bearing 120 Degree To An Airstrip A. Another Aeroplane Y Leaves Kano Airport At 10:00am And

2. ## algebra

Sophie is buying fabric to make items for a craft fair. The table shows some combinations of how much of each color fabric she might buy. Which equations model the total yards of fabric Sophie will buy? Check all that apply.

3. ## Calculus

The demand function for the Luminar desk lamp is given by p = f(x) = −0.1x^2 − 0.7x + 20 where x is the quantity demanded in thousands and p is the unit price in dollars. (a) Find f '(x). (b) What is the rate of change of the unit price (in dollars per

4. ## Mathematics

A sector of a circle of radius 7cm subtends angle 270° at the centre. Calculate a. Length of arc b. Area of sector c. Perimeter of sector

5. ## mathematics

From a point p on level ground, the angle of elevation of the top of a tree is 60 degrees. if the tree is 39 m high, how far is its base from p

6. ## Math

Wren's investment manager informed her that she has a dividend yield of 6 from her investment with AB PLC. If the shares of the company currently trade for \$20 on the Stock Exchange, what is the total dividend Wren receives if she has 2000 shares in AB

7. ## Physics

1. A 2.5 kg mass at rest on a horizontal surface is acted upon by an applied horizontal force of 150 N. A frictional force of 100 N acts on the mass. How much work is done on the mass after 5 m? I got 250 J but I'm not sure if that's correct. 2. A mass of

8. ## Mathematics

The set of positive integers greater than 2 and less than 6

9. ## Math

For a confidence level of 80% with a sample size of 26, find the critical T value. Please help

10. ## mathematics

if sin p = 3/5 and p is an acute angle, what is the value of tan p.

11. ## Math

The roots of x^2 + 5x + 3 = 0 are p and q, and the roots of x^2 + bx + c = 0 are p^2 and q^2. Find b + c.

12. ## Chemistry

1-◇Formed with NaOH, HCl, NH3 and H2CO3 acids and bases; I. NaCl, II. Na2CO3, III. NH4Cl Which or which salts hydrolysis? a) I only b) II only c) III only d) I and II e) II and III 2-◇H2 (g) + CO2 (g) H2O (g) + CO (g) K1 2CO (g) + O2 (g) 2CO2 (g) K2

13. ## math

Two trains leave stations 390 miles apart at the same time and travel toward each other. One train travels at 65 miles per hour while the other travels at 85 miles per hour. How long will it take for the two trains to meet?

14. ## Math

Tommy is 58-year-old and has operated his Roth IRA account for 7 years. He intends to retire at 60. Exactly six months ago, he withdrew 23 of his Roth IRA balance and invested in the stocks of a company that just filed for bankruptcy. He wants a steady

15. ## Math

What is the average rate of change for the function f(x) = x^3 − 6x^2 + 4x +7 over the interval 0≤x≤5?

16. ## Maths

If (2x-1)^4 = ax^4+bx^3+cx^2+dx+e then find the value of a+2b +4c+8d+16e..plz help easy way..

17. ## mathematics

The universal gas law states that the volume(v m cube) of a given mass of an ideal gas varies directly with its absolute temperature (TK) and inversely with its absolute temperature (TK) and inversely with its temperature(TK) and inversely with its

18. ## Mathematics

Write the place value of each of the digits in 387

19. ## physics

1- A 40.0cm diameter loop is turned to the position where the largest flux is handled in a uniform electric field. In this position, the flux is obtained as 5.20 × 10 ^ 5 N.m ^ 2/c Find the twist of the electric field. 2- An electron was released from

20. ## Science

The molar ratio of carbon to hydrogen of a volatile liquid compound is 1:2. 0.12g of the liquid on evaporation at 6 s.t.p gave 32cm³ of vapour. The molecular formular of the liquid is (GMV=22.4dm³ C=12, H=1)

21. ## Science

When 2.75 dm3 of O2 react with an excess of glucose (C6H12O2), according to the reaction below, what volume of carbon dioxide will be produced? 6O2(g) + C6H12O6(s) ---> 6H2O(g) + 6CO2(g)

22. ## Mathematics

In a school,1/10 of the pupil like mathematics.Half of those who like mathematics are girls.If there are 240 pupil altogether in the school,how many girls like mathematics

23. ## Physics

A magnetic bar is moved toward a 40 turn circular coil of wire. If coil radius is 3.05 ohms Find the magnitude of A) the induced E. M. F B) the induced current How?

24. ## Calculus

Determine the scalar equation of a plane where any point on that plane is equidistant to the points A(-1, -4, 0) and B(5, 2, 4)

25. ## Math

Assuming the population has an approximate normal distribution, if a sample size n = 17 has a sample mean x = 47 with a sample standard deviation s = 3 , find the margin of error at a 98 % confidence level. Round the answer to two decimal places. Please

26. ## math

how many degrees does the minute hand of a clock travel between 3:15am and 4:30pm?

27. ## mathematics

The mass of a sheet of metal varies jointly with its area and its thickness.A sheet of metal of area 250 cm square and thickness 1 mm has a mass of 200 g. (a) Find the formula which connects the mass Mg,the area A cm square and the thickness t mm. (b)

28. ## Algebra

Hello, I've been having trouble with the following question: Identify all real solutions for x in the equation 2(2^x- 1) x^2 + (2^{x^2}-2)x = 2^{x+1} -2. Please help ASAP. Thanks in advance!

29. ## Law

How do I compare the Pacific island country laws with Australia? Support it with examples.

30. ## Physics

A particle residing in one dimension is moving with constant acceleration a=-4m/sec^2 .At time t =2sec, the particle is located at x=3m and is observed to have velocity v=6m/sec. (a) At what instants is the particle to be found at x=0m?(ii)what is the

31. ## Physics

Suppose that the concentration of electrons in n-type Ge at room temperature decreases linearly from 5 x 10^16/cm^3 to zero over an interval of 2mm. a) Calculate the diffusion current b) What is the value of the electric field required to produce a drift

32. ## Mathematics

Which value of k will make the lines parallel r= (1,2)+s(2,3), S e R and 12x + ky=0

33. ## maths

how many discs of diameter 6cm can be stamped from a rectangular sheet of metal mesuring 8cm by 30cm? what area of metal is wasted?

34. ## Calculus

Determine the equation of the line o intersection between the planes 2x-2y+z-4=0 and 2x-3y-z+8=0 State as vector equation

35. ## Calculus

Given the line (x+2)/2=(y-7)/3 = (z+8)/-3, and the plane 2x+3y-4z-7=0 Determine the point of intersection, and the angle of intersection, if they exist

36. ## Mathematics

Mandla promised to give his mother 2 over 9 of his salary to help with the monthly costs. If he earns R3240 per month. How much does he give her?

37. ## Mathematics

What is the 20th term in the sequence defined by tn = n^2 - 2n/2n - 30?

38. ## English

"Building these instruments with garbage and to refine them to a level in which these instruments constantly sound good has been a process that has also taught the kids that things in life don't always happen immediately, that things don't just happen

39. ## science

In expressing experiential error or uncertainty, when does one use (a) experimental error and (b) percentage difference

40. ## Physics

1- A 40.0cm diameter loop is turned to the position where the largest flux is handled in a uniform electric field. In this position, the flux is obtained as 5.20 × 10 ^ 5 N.m ^ 2/c Find the twist of the electric field. 2- An electron was released from

41. ## mathematics

A village is 8km on a bearing of 040° from a point 0,calculate how far the village is north of 0.

42. ## Mathematics

The bearing of point A from point B is 060degree. What is the bearing of point B from point A

43. ## mathematics

Use the table to calculate the average rate of change of f(x) over the interval [0,4]. x f(x) -4 1 -3 2 -2 4 -1 8 0 16 1 32 2 64 3 128 4 256

44. ## Chemistry

1- Calculate the splitting energy of [Co (NO2) 6] -3 since 364 nm has a single band? 2- 420 micro Siemens value is read in the conductivity device for the complex prepared at the concentration of 1.10-3 M. Calculate the number of ions of the complex? 3-

45. ## Chemistry

Calculate the pH of the solution formed when 20mL of 0.100 mol/L HNO_3 is added to 30 mL of 0.050 mol/L KOH.

46. ## US government

How does federalism seek to eliminate the disadvantages of both the confederal and unitary systems? I can't seem to understand or find an answer.

47. ## English

What is a preposition

48. ## Math

The Displacement (in metres) of an object moving in a straight line is given by s=1+ 2t + 1/4 t^2, where t is measures in seconds. a) Find the average velocity over the time interval [1,2]. do not interpret the physical meaning of the value for this