1. Physics

A 710kg car drives at a constant speed of 23m/s . It is subject to a drag force of 500 N. What power is required from the car's engine to drive the car (a) on level ground? (b) up a hill with a slope of 2.0∘ ?

2. Math

The bases of trapezoid ABCD are AB and CD. Let P be the intersection of diagonals AC and BD. If the areas of triangles ABP and CDP are 8 and 18, respectively, then find the area of trapezoid ABCD.

3. science

A geneticist is studying a pedigree that shows the family history of a recessive genetic disease. Which of the following pedigrees shows an impossible relationship? (

4. Math

Let ABCD be a parallelogram. Let M be the midpoint of AB and N be the midpoint of AD. Diagonal BD intersects CM and CN at P and Q, respectively. Find PQ/BD.

5. chemistry

20.0 g of ammonium nitrate (NH4NO3) is dissolved in 125 g of water in a coffee-cup calorimeter, the temperature falls from 296.5 K to 286.4 K. Find the value of q for the calorimeter.

6. math

the area of a triangle is equal to 48 cm squared and two of its sides measure 12 cm and 9 cm, respectively. find the possible measures of the included angles of the given sides.

7. Math help plz check my answers!

1. Write the ratio in the simplest form. 50:10 25:5 10:2 5:1 1:5 2. Solve the following proportion. r/5= 9/21 r = 9 r = 2.14 r = 11.66 r = 37.8 3. A recipe calls for 3 cups of flour to make 3 dozen cookies. Use the proportion to calculate how much flour is

8. Science

How did Lamarck and Darwin differ in their thinking about species? A. Darwin thought that organisms could induce their own changes, while Lamarck thought that change could only be induced by an organism's environment. B. Darwin thought that change could

9. math

Electron Tube Electronics made 50,000 TVs last month. If 3.5% of them were high definition, how many high definition TVs were produced?

10. Science

Luther Burbank was a plant breeder who developed a strain of potato plant that produced more tubers of larger size than other potato plants that were grown on farms at the time. This strain of potato was also resistant to the potato blight that had wiped

11. Statistics

Exercise 8.92 Tony's Pizza guarantees all pizza deliveries within 30 minutes of the placement of orders. An agency wants to estimate the proportion of all pizzas delivered within 30 minutes by Tony's. What is the most conservative estimate of the sample

12. Calculus

An observer stands at a point P, one unit away from a track. Two runners start at the point S in the figure and run along the track. One runner runs 2 times as fast as the other. Find the maximum value of the observer's angle of sight è between the

13. Algebra

Make a conjecture about the solution of a system of equations if the result of subtracting one equation from the other is 0 = 0 A. There are no solutions b. there are infinite number of solutions c. Cannot determine any solution d. the solutions are

A garden will be made up of a parallelogram, a rectangle and a triangle. The garden must have an area of 500m2. Draw two possible gardens. Determine the dimensions of each part of the garden, and justify your choice of these dimensions.

15. College alerbra

Scott invested a total of $9500 at two separate banks. One bank pays simple interest of 11% per year while the other pays simple interest at a rate of 9% per year. If Scott earned$973.00 in interest during a single year, how much did he deposit in each

16. Physics

Problem 2- A 4 kg object is attached to a vertical rod by two strings, as in the Figure. The object rotates in a horizontal circle at constant speed 6 m/s. Find the tension in (a) the upper string and (b) the horizontal string.

17. Calc

At noon, ship A is 100km west of ship B. Ship A is sailing south at 30km/h and ship B is sailing north at 15km/h. How fast is the distance between the ships changing at 4:00pm?

18. Physics

A 61-kg snow skier is being pulled up a 14 ° slope by a steel (Young's modulus 2.0 x 1011 N/m2) cable. The cable has a cross-section area of 7.0 x 10-5 m2. The cable applies a force to the skier, and, in doing so, the cable stretches by 2.1 x 10-4 m. A

19. Physics

Problem 3- A 40 kg child swings in a swing supported by two ropes, each 3 m long. (a) If the tension in each rope at the lowest point is 350 N, a. find the child's speed at the lowest point. b. the force exerted by the seat on the child at the lowest

20. Math

A Norman window has the shape of a rectangle surmounted by a semicircle. (Thus, the diameter of the semicircle is equal to the width of the rectangle.) If the perimeter of the window is 30 ft, find the dimensions of the window so that the greatest possible

21. Physics

A 68-kg water skier is being pulled by a nylon (Young's modulus 3.7 x 109 N/m2) tow rope that is attached to a boat. The unstretched length of the rope is 15 m and its cross-section area is 1.8 x 10-5 m2. As the skier moves, a resistive force (due to the

22. Challenge

Suppose you have been hired as a financial consultant to Defense Electronics, Inc. (DEI), a large, publicly traded firm that is the market share leader in radar detection systems (RDSs). The company is looking at setting up a manufacturing plant overseas

A soccer goalie has saved 14 shots and let in 1 goal. Explain Please!!!

24. Solar Energy

With respect to a PV module's I-V and P-V curves, and the module's operating point, consider the following statements: a) When the operating point of the PV module is on the MPP (maximum power point), $$P_{mpp} \lt V_{oc} \times I_{sc}$$ b) For a given

25. TRIPLE JUNCTION SOLAR CELL - I

The figure below presents the EQE of a triple junction solar cell with junctions A, B and C under short circuited (V = 0 V) condition. EQE table is: A: EQE = 0.7 wavelength= 300 to 650 nm B: EQE = 0.9 Wavelength= 650 to 850 nm C: EQE = 0.8 Wavelength= 850

33. reading what does this mean?

Those members will create a "page" in a characterization book entitled "Two Kinds." Each page will present a character, character terms specific to this character, a graphic image and text suppot that "proves" each character term that has been assigned.

34. Physics

A steel (Young's modulus 2.0 x 1011 N/m2) wire is strung between two supports attached to a ceiling. Initially, there is no tension in the wire when it is horizontal. A 98-N picture is then hung from the center of the wire, as the drawing illustrates, so

35. Chemistry

Balancing Complete Redox Reactions I need help on the half reduction part for both reduction and oxidation of Cl2(g) --> cl^1- (aq) + OCl^1- (aq). I got both of the half reactions started. Cl2 --> Cl^- (Reduction) .... Cl^1- (aq) + OCl^1- (aq) (Oxidation).

36. english

An important purpose of myths is A. to create interesting entertainment and exciting story plots. B. to illustrate the connections between modern times and the past. C. to build an understanding of the past and teach lessons for the future. D. to establish

37. Finance Challenge

The new RDS project is somewhat riskier than a typical project for DEI, primarily because the plant is being located overseas. Management has told you to use an adjustment factor of 3 percent to account for this increased riskiness. Calculate the

38. physics-can anyone solve this please

3. A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a

39. physical

Specific Heat. Copper has a specific heat of 0.092 cal/g/deg C. A 75 gram copper mass has been heated to a temperature of 100 degrees C. The copper is placed in thermal contact with 50 grams of water at 25 degrees C. What will be the final equilibrium

47. English

Is it passive or active voice? Many clothes (we're given) to the homeless shelter. Passive By the end of today, the students (will have mastered) the grammar. Active My aunt Margot ( has been traveling) with her daughter. Active The cookies (have been

Excerpted from A Tale of Two Cities by Charles !@#$%^&ens  Saint Antoine* had been, that morning, a vast dusky mass of scarecrows heaving to and fro, with frequent gleams of light above the billowy heads, where steel blades and bayonets shone in the asked by orpheus 49. financial analysis Total Current assets Total Current Liabilities Net Working Capital Current Ratio a. Cash is acquired through issuance of additional common stock. _________ _________ _________ _________ b. Merchandise is sold for cash. (Assume a profit.) ___+______ asked by Anonymous 50. math Solve the following proportion:t/8 = 3/4 asked by Matt 51. Math The radius of a circle and it's circumference Direct or inverse asked by Anonymous 52. math Miriam is four years older than Ricardo. 10 years ago she was 3 times as old as Ricardo was then. A) How old are they now B) determine whether your answer is correct by checking that it satisfies the conditions of the problems asked by Kay 53. waste water The cross-sectional surface area of the screen channel during maximum flow = 0.75 m2. The maximum free surface area in the clean screen = 0.5 m2. Use hL=1C⋅(V2−v2)(2⋅g) for calculating the head loss, the friction coefficient (C) for a clean screen is asked by bilal 54. physics how much work (in ft lb) is done by a large bucket that can lift 4.5 ton of dirt 14 ft into the air and dump it into a 5.0 yd cubed dump truck? asked by carol 55. algebra 1 Marissa is a photographer. She sells framed photographs for$100 each and greeting cards for $5 each. The materials for each framed photograph cost$30, and the materials for each greeting card cost $2. Marissa can sell up to 8 framed photographs and 40 asked by malik 56. CHEMISTRY BALANCING CHEMICAL EQUATION H2SO4 + NaOC = Na2SO4 + H2O asked by HYO JIN 57. algebra 1 This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS). asked by mark 58. myths In the archetypal heroic quest, the hero A. goes on a quest to demonstrate his strengths and perfection. B. overcomes all challenges without damage to his core strengths. C. exhibits both strengths and flaws as he faces challenges. D. builds a following as asked by orpheus 59. math Find the area of the shaded region. View the graph and image at: postimg.o rg/image/dg4kt89v1/ Please help me explain this one. I know the ans to this one but can not work out. asked by math 60. Haikus Are these ok? The wild animals Are very protective of Their natural home The sunlight is nice For us to see in daylight And helps us keep warm Do any of these contain symbolism? If so, which ones and where? asked by Izzy 61. 8th grade science :( How does the sun's gravity influence tides? asked by helena 62. Accounting Hawkeye Electric Company engaged in the following transactions during July. Journalize the preceding transactions on the books of Hawkeye Electric Company using the perpetual system of inventory. July 2 – Purchased inventory for cash,$800 July 5 –

1/5 of 10% of 200g how would i solve this plz explain!! (one over five of ten percent of two-hundred grams)

64. cal

The function gives the distances (in feet) traveled in time t (in seconds) by a particle. Find the velocity and acceleration at the given time. s= √(t^2-5), t=3

65. English

1. She cut it open. (Is 'open' an objective complement? What is the part of speech of 'open'? Is 'open' an adjective or a 'verb'?) 2. Chocolate is made from cocoa beans. 3. Chocolate is made from cacao beans. (Which one is correct?) 4. He is picking up a

72. Matt

Multiply and then simplify the following expression: (2t + 1)(t - 3)

(2a4)2 = ?

74. algebra

How do i write the qoutient of twenty four and the number p as a variable expression using p as the variable

75. rhetoric (essay writing)

I just need a few ideas of what are the causes of racism in EGYPT and things that I can talk about relating to social class for my research paper please. Im focusing on "black" racism. Thanks :)

76. Algebra

After one round in a card game, your score was 42 points. After the second round, your score was -2 points. How many points did you lose in the second game?

I have a few questions that I'm not 100% about. 1. A warranty that provides restricted protection is called a ________. A. minimal warranty B. special warranty C. limited warranty D. warranty for a particular purpose I said A. 2. If the party to whom goods

78. statistics

IQ scores were obtained from randomly selected couples.For 20 such pairs of people, the linear correlation coefficient is 0.881 and the equation of the regression line is y= -6.93+ 10.8x, where x represents the IQ score of the husband. Also, the 20x values

96. Math

True or false if x > 9 then 2 x > 18

97. Math

Combine like terms: 11r + 3 - 12 + 2r

98. math

Simplify the following algebraic expression: b[b(b - 2) - 4] + 1

99. math

I do not understand how the odds of drawing a queen from a deck of cards is 3to1

100. algebra 1

and I need help on this one problem This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS). would a graph model this problem situation?

101. English

The duckling started swimming out of instinct when she followed the rest of the flock into the lake for the first time. Do any commas need to be added?

102. law

How does prosecutorial discretion affect the overstating of laws on average sentencing?

103. Yanii

What property of water forms a meniscus?

104. Yanii

What unique property of water allows organisms living in lakes to survive in below zero winter conditions ?

asked by Biology, One more question
105. Algebra

The result of multiplying 2 by x plus y times 3 plus 5 times z is equal to 10.

106. Algebra

The product of x and 3 plus the product of 7 and y plus z times 4 is equal to 3.

107. Haikus

Would this be a good haiku? Wisconsin snow falls Gently and softly like rain The children go play

108. Math

Flora traveled 795miles from Dalls to Atlanta . then she traveled 841miles from Atlanta to new york . About how many miles did Flora travel in all? Answer,, 795+841=1636 The answer ,,,add or multipiy. 2/ A square box holds 49 teniss balls. What

109. law

How do “Other” crimes cause any estimated difference in classification of three-strikes arrests?

110. Algebra (Verbal Expressions- More Difficult)

The sum of 6.5 times u, 5 and -2. plus the product of 3.5 and x is equal to the result of adding x, 4.5 times y and -10. The sum of x and y plus the result of adding z and 8.5 equals 2 times x plus -3 times y plus the result of multiplying 5 by u plus -7..