# Questions Asked onApril 30, 2020

1. ## Mathematics

Kinyua spent 1/4 of his net January salary on school fees .He spent 1/4 of remainder on electricity and water bills .He spent 1/9 of what remained on transport .if he finally has 8400 calculate total January salary

2. ## science

Which of the following adjustments would cause an image to change from real to virtual? a)moving the object from the focal point of a converging lens to a position inside the focal length b)moving the object from the focal point of a diverging lens to a

3. ## science

Which of the following choices correctly explains why light separates into colors when moving through a prism? a)The different colors of light travel at different speeds through glass so they refract at different angles. b)The different colors of light

4. ## Statistics

Find the area under the standard normal curve between z = - 1.5 and z = 2.5

5. ## Math

3. Kara needs 15 apples to make 2 pies. She made this table to show how many apples she would need for different numbers of pies. Number of apples- 15 , 30 , 45 , 60 Number of pies- 2 , 4 , 6 , 8 , 10, 12 At this rate how many apples will Kara need to make

6. ## Solar

Which of the following processes is used in order to fabricate polysilicon?

7. ## chemistry

When magnesium metal (Mg) is burned, it forms MgO. How many moles of oxygen gas (O2) are needed to burn 20 moles of Mg? The balanced equation is: 2Mg + O2 --> 2MgO

8. ## Math

Equation practice with angle addition Given: m∠AOCm, angle, A, O, C is a straight angle. \qquad m \angle BOC = 6x + 29^\circm∠BOC=6x+29 ∘ m, angle, B, O, C, equals, 6, x, plus, 29, degrees \qquad m \angle AOB = 3x + 124^\circm∠AOB=3x+124 ∘ Find

9. ## Science

What evidence exists to support the theory of evolution at the amino acid level

10. ## math

Find the radius of a sphere with a volume of 972π cubic millimeters.

11. ## SCIENCE

3.Describe two applications each of hydrodynamics and aerodynamics.

12. ## Mathematics

A recipe for cookies requires 2/3 cup of butter.Rama wants to make 3/4 of the recipe.how many cups of butter should rama use to make the cookies?

13. ## Mathematics

Work out the product of 1 4/5 and 1 5/8

14. ## physics

The energy gained by an electron when it is accelerated by an electric field is ___ the energy lost due to collisions. -greater than -equal to*

15. ## Solar

Let's assume that solar light reaches a silicon solar cell with an angle of incidence of $$\theta_i=0^o$$. For simplicity, let's consider the refractive index of silicon to be $$n_{Si}=3.5$$. The refractive index of air is $$n_{air}=1$$. What percentage of

16. ## Math

The table below shows the results of flipping two coins. how does the experimental probability of getting at least one tails compare to the theoretical probability of getting at least one tails Outcome: HH HT TH TT # of times Tossed: 28 22 34 16 Question

17. ## Science

Describe two aspects of dams that depend on the proper flow of fluids.

18. ## math

A jar contains 5 red marbles and 8 white marbles. Event A = drawing a white marble on the first draw Event B = drawing a red marble on the second draw If two marbles are drawn from the jar, one after the other without replacement, what is P(A and B)

19. ## Chemistry

The oxidation of copper(I) oxide, Cu2O(s) , to copper(II) oxide, CuO(s) , is an exothermic process. 2Cu2O(s)+O2(g)⟶4CuO(s) The change in enthalpy upon reaction of 70.64 g Cu2O(s) is −72.08 kJ . Calculate the work, 𝑤 , and energy change, Δ𝑈rxn ,

20. ## mathematics

a kite with a string 150 feet long makes an angle 45 with the ground, assuming the string is straight ,how high is the kite?

21. ## algebra

A street that is 227ft long is covered in snow. City workers are using a snowplow to clear the street. The snowplow has tires that are in 2.5ft diameter. How many times does a tire have to turn in traveling the length of the street? Use the value 3.14 for

22. ## Solar

We have discussed that indirect band gap materials have a lower absorption coefficient than direct band gap materials, due to the fact that the charge carriers need a change in energy AND momentum in order to be excited. If both Si and Ge are indirect band

23. ## probability

An organization will give a prize to a local artist. The artist will be randomly chosen from among 10 painters, 3 sculptors, and 5 photographers. What is the probability that the artist chosen will be a sculptor or a photographer?

24. ## Math

A dog chased after a dandelion for 0.5 km, stopped to take a rest, and continued to chase after the dandelion for 750 m. How many meters did the dog travel in total?

25. ## Science

What is one effect of the Gulf Stream? A: Summers in Spain are hotter than summers in Maine. B: Summers in Florida are hotter than summers in Sweden. C: Winters in Iceland are colder than winters in Georgia. D: Winter days are shorter in England than in

26. ## probability

Confidence interval interpretation Every day, I try to estimate an unknown parameter using a fresh data set. I look at the data and then I use some formulas to calculate a 70% confidence interval, [Θˆ−,Θˆ+], based on the day's data. Are the following

27. ## MATHS

Researchers at Jackson Hospital asked 40 randomly selected patients about their sleep habits. Sixteen reported sleeping 8 hours or more each night. If there are 700 patients in the hospital, estimate the number of patients who sleep 8 hours or more each

28. ## Algebra

A chain saw requires 6 hours of assembly and a wood chipper 4 hours. A maximum of 48 hours of assembly time is available. The profit is $190 on a chain saw and$ 220 on a chipper. How many of each should be assembled for maximum​ profit? To attain the

29. ## physics

A 8 kg object is pulled along a horizontal surface at a constant speed by a 30 N force acting 60 degrees above the horizontal. How much work is done by the force as the object moves 7 m?

16 + p = >50

31. ## Mathematics

A quarter of jones marbles are blue.If he has 12 marbles.How many marbles does he have altogether?

32. ## Math

I can't figure out how to do this 2/3+1/9? Can anyone help me?

33. ## English

Grandma Sands tells Momma that “things are different from what they were when you left. Nearly everything changes.” What does Grandma Sands mean by this? What has changed? How does this change affect the characters in the story?

34. ## social studies

Select the boxes in the table to show which geographic features are found in each country. archipelago coastal plain China Japan Korea Japan Korea

35. ## Mathematics

The first side of a triangle is 7 cm shorter than twice the second side. The third side is 4 cm longer than the second side. The perimeter is 77 cm. Which equation represents how to find each side? a) 4x + 3 = 77 b) 3x - 11 = 77 c) 3x - 3 = 77 d) 4x - 3 =

36. ## algebra

Two similar data sets are being compared. The standard deviation of Set A is 4.8. The standard deviation of Set B is 6.5. Which statement about the data sets is true? a)The mean of the data in Set B is greater than the mean of the data in Set A. b)The

37. ## Mathematics

he distance between two cities on a map is 2 inches. The map scale is ¼ inch = 5 miles. What is the actual distance between the cities?

38. ## English

In lines 51-60 (“O, she doth teach the torches to burn bright”), Romeo’s first lines upon seeing Juliet, find an example of alliteration, personification, and simile.

39. ## Math

There is a bag with 10 marbles. There are 6 blue marbles and 4 red marbles. What is the probability of picking 2 red marbles without replacement?

40. ## Mathematics

There is a bag with 10 marbles. There are 6 blue marbles and 4 red marbles. What is the probability of picking 2 red marbles WITH REPLACEMENT!

41. ## Mathematics

Which of the following is a true statement? 1. -9 > -4 2.|-10| > |2| 3. | -3| < |1| 4. 6 < -12 My answer is 2

42. ## pre-calculus

A flagpole at right angle to the horizontal is located on a slope that makes an angle of 12∘ with the horizontal. The pole's shadow is 16 meters long and points directly down the slope. The angle of elevation from the tip of the shadow to the sun is

43. ## Algebra

12. Sn = 1550, n = 3, r = 5 13. Sn = 1512, n = 6, r = 2 14. Sn = 6854.4, r = 2, an = 3481.6 15. Sn = 4860, r = 3, an = 3280.5

44. ## math

what is 4×4 to the power of 10

45. ## probability

Bias and MSE We estimate the unknown mean θ of a random variable X with unit variance by forming the sample mean Mn=(X1+⋯+Xn)/n of n i.i.d. samples Xi and then forming the estimator Θˆn=13⋅Mn. Your answers below can be functions of θ and n. Follow

46. ## creative writing

the clover told me he was good luck

47. ## Chemistry

What mass of Cl2 gas is needed to react with 2.48 mol TiO2

48. ## physics

Which of the following statements about electromagnetic radiation is true? -It transfers energy to objects in the path of the electromagnetic waves. -It can be converted to other energy forms. -It transports the energy of electromagnetic waves. -all of the

49. ## Social Studies

Choose 2 of the following and describe how the ideas of the Hebrew traditions are reflected in Western civilization: belief in God, observance of law, practice of the concepts of righteousness and justice, and importance of study. (This is for a project.

50. ## physics

___3.0Ω__ | | 3.0Ω 3.0Ω _____| |_____ |__3.0Ω__| What is the equivalent resistance for the resistors in the figure shown above? -1.3Ω -2.2Ω* -3.0Ω -12.0Ω please confirm :)

51. ## math

Margaret is playing a game with a standard deck of 52 cards which contains 4 jacks. The first player to select a jack gets to start the game. What is the theoretical probability that Margaret, when choosing first, will choose a jack?

53. ## math

salesmann is paid a salary of Rs .500 per month and one percent commission on sales. if his total income in one month is Rs. 750. find the value of his sales in that month.

54. ## Mathematics

Calculate the line of symmetry and the turning point of (8 + 2x) (5 − x)

55. ## mathematics

a population is increasing at 2.5% p.a. If it is 20400000 now, how large was it a year ago

56. ## Further maths

The sum of the first four terms of a linear sequence (A.P.) is 26 and that of the next four terms is 74. Find the value of (1)the first term (2) the common difference

57. ## Math

Which function is a quadratic function? A. y= 1/x B. y= y=5x - 7 C. y= -2x^2+2x **** D. y= |x|

58. ## algebra

Solve 3(x^4)^3 + (3*x^4)^3

59. ## algebra

You want to read more than 50 pages in a book this week. You have already read 16 pages. Write and solve an inequality to find how many more pages you need to read this week. Be sure to write your answer as a solution set.

92. ## English

1.persuasion is achieved by the speaker's personal character when the speech is so spoken as to make us think him credible 2. secondly, persuasion may come through the hearers when the speech stirs their emotions. 3. thirdly, persuasion is effected through

93. ## english

PLEASE HELP Which of the following TWO statements would be considered hasty generalizations? ◻People over the age of 50 are not good with new technology. ◻George W. Bush was a pretty average president. ◻He has never shot a gun so he shouldn't be

94. ## social studies

What did Francis Bacon believe scientists should rely on to explain the laws of nature? A. Greek learning B. Church teachings C. mathematics D. inductive reasoning

95. ## mathematics

At Arthur’s Bakery, 1 8 of the baked goods are cakes, and the rest are pies. One third of the pies are cherry. What fraction of all of the baked goods at Arthur’s bakery are cherry pies?

96. ## Geometry

How do I go about this? I need details solution to study find any given rectangle ∆ R=(xbase0,xbase0+w).(ybase0.ybase0+h) if we define function A A(R)= ∫ ∫R e^(2iπ(x+y)dxdy ????

97. ## math

What are independent and dependent events? How about replacement/without replacement?

98. ## Math

What is y-intercept??? Is it like slope?????

99. ## math

the folling shapes are all quadrilrterals because they all have four sides witch quadrilateral has equal sides but does not have equal angles

100. ## Math

The tent is 30ft wide with a center pole that is 7ft high what is the angle of elevation from the ground to the top of the pole

101. ## Math

What is the explicit equation best models the situation: 10.3, 9.6, 8.9, 8.2, ...

102. ## Math

What is the explicit equation best models the situation: 10.3, 9.6, 8.9, 8.2, ... Is it: t(n)=-0.7n+10.3? or is it: t(n)=-0.7n-11?

103. ## Math

a vegetable garden is in the shape of a rectangle, surrounded by 296 feet of fence. the length of the garden is 61 feet more than twice the width of the garden. fins the dimensions of this garden

104. ## Chemistry

What is the Acid, Base, Conjugate Acid, and the Conjugate Base of HClO4(aq) + H2O(l) ⇄ H3O+(aq) + ClO4–(aq)?

105. ## Science

Why are there colors on a rainbow?

112. ## maths

newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporter's data is valid or not? A. The data

113. ## Social Studies

Unlike the peoples of the plane cultures who built portable homes called teepees the people of the puebloan culture built permanent homes made from? A. Wood B. Sod C. Bison hides D. Adobe please helppp

114. ## Chemistry

Which can be used as a standard solution in neutralization titrations? a. Na2CO3 c. CH3COOH b. NaHCO3 d. NaOH

115. ## Neural

Teresa is a 21-year-old female who was involved in a motor vehicle accident. She was ejected from her truck upon impact with another vehicle and suffered a significant brain injury. Her GCS in the field was 12 and improved to 13 upon admission to the

116. ## Chemistry

Which can be determined titrimetrically with the standardized HCl solution? a. NH3 b. NaNO3 c. CH3COOH d. NaCl

117. ## Mathematics

How do I go about this? I need details solution to study find any given rectangle ∆ R=(xbase0,xbase0+w).(ybase0.ybase0+h) if we define function A A(R)= ∫ ∫R e^(2iπ(x+y)dxdy Assuming the range for (x,y) are for all real positive integer ....where do

118. ## Chemistry

The Ksp of AgI is 8.5 × 10-17. Find the solubility of AgI in M

119. ## Math

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120. ## MATH

Suppose that θ is an angle in standard position whose terminal side intersects the unit circle at , 1161−6061. Find the exact values of secθ, cotθ, and sinθ.

121. ## Spanish 202

Hello Sra, I hope you are well. If you don't mind, could you help me with my answers? LOS MANDATOS AFIRMATIVOS. Forme mandatos afirmativos directos según el ejemplo: Ejemplo: BUSCARLO (tú) --> Búscalo 1. COMER (nosotros) --> __________ Comamos 2.

122. ## Science

a circular section 8.0cm in diameter is marked out 9f a rectangular plate 20cm ×18cm in dimensions. if the centre of the section marked out lie on the diagonal abd is 7.0cm from the centre of gravity of the rectangular plate, determine the position of the

123. ## Chemistry

I need to obtain "3-Hexenedioic acid" by using solely an alkene. Can you help me to find what is the alkene? And please do not forget required reagents and catalysts

124. ## mathematics

22. The following data are from a study of the number of pounds subjects lost after 3 months on a regimen of 1) only diet and exercise or 2) diet and exercise with a personal trainer or 3) diet and exercise with a support group. You want to determine if

125. ## Math

In how many distinct ways can you arrange the letters PERMUTATION?

126. ## math

How do you find the vertical asymptote of f(x) = -ln(1-x)

127. ## Math

Hello! Here is my question. What is an equivalent expression to 42.50/8.50? I'm having trouble finding ways to find equivalent expressions to this certain problem.

128. ## Physics

A puck is moving on an air hockey table. Relative to an x, y coordinate system at time t = 0 s, the x components of the puck's initial velocity and acceleration are v0x = +2.2 m/s and ax = +2.5 m/s2. The y components of the puck's initial velocity and