# High School

Science
Plzz Help me i need help Why is California's high speed rail such a groundbreaking effort??

world history
Please check my answers. 1. Which of the following separates the Arabian Peninsula from Africa? 1.The Persian Gulf 2.The Red Sea*** 3.the Indian Ocean 4.The Mediterranean Sea 2. Why is food often used as a positive benefit of the Colombian exchange, as described in this lesson...

maths
Mere, Sam and Nathan go to a bookshop to buy supplies for their school. Mere bought two erasers and four pencils and paid \$2.40 for it. Sam bought six erasers, one pencil and two pens and paid \$3.95 while Nathan paid \$4.15 for an eraser, a pencil and four pens. Write a system ...

Math
A utility company charges \$67.65 plus \$1.1917 per therm for gas usage in excess of 50 therms. Last​ winter, one​ homeowner's bill ranged from a low of \$196.35 to a high of \$214.23. Over what range did gas usage vary​ (in therms)?

Calculus
At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 6 cubic feet per minute. The diameter of the base of the cone is approximately three times the altitude. At what rate is the height of the pile changing when the pile is 22 feet high?

Math
Peter spends 1/4 of his salary on food, 1/3 on clothing and 1/5 on school fees. He saved the rest. What fraction if his salary did he save?

English
this is a sentence from Another Evening at the Club The spectres of the eucalyptus trees ranged along the garden fence rocked before her gaze, with white egrets slumbering on their high branches like huge white flowers among the thin leaves The author most likely compares the ...

Math
A middle school wants to have its students see a movie at a local theater. The total cost of the theater and movie rental is \$1,500. What equation shows how the cost per student depends on the number of students who attend? I'm not really sure what this question is asking me ...

English
Write the correct word. The student was ____ of school rules and usually arrived late to class. disdain or disdained answer: disdained

Physics
A ball is thrown with a speed of 19m/s and at an angle of 46 degrees. How high does it go above the cliff to the nearest tenth?

Science
Can Someone explain this? Should other states wait to see if the high-speed rail system works well before starting their own plans for similar systems?

seabreeze high
A girl spends on fifth of the money in her purse. She then spends one fifth of what remains in the purse. She spends \$72 in all. How much money did she have from the beginning?

Algebra
Suppose you throw a ball up in the air from the top of a 160 foot building. It's height h in feet after t seconds is given by the function h= -8t^ + 48t + 160 a) When does the ball reach it's maximum height? b) What is the ball's maximum height? c) How long does it take before...

Math
cheryl used 1 inch thick wood to build a planter for some flowers. the planter has 4 sides and a bottom but no top. the outside dimensions are 3 feet long, 6/12 inches wide, and 6/12 inches high. cheryl wants to know how much space the planter takes up. what is the volume of ...

math
from the top of 50 metre high hill the angle of depression of the top and the bottom of a tower are 30°and45°.find the hight of the tower

Algebra I
Suppose you throw a ball up in the air from the top of a 160 foot building. It's height h in feet after t seconds is given by the function h= -8t^ + 48t + 160 a) When does the ball reach it's maximum height? b) What is the ball's maximum height? c) How long does it take before...

Math - Trig
Two buildings of equal height are 850 feet apart. An observer on the street between the buildings measures the angles of elevation to the tops of the buildings as 29° and 40°. How​ high, to the nearest​ foot, are the​ buildings? I don't know how to set this up

Algebra
How much weight will a 4 I ch wide 4 inch high and 216 inches long beam support

value
A Man Of Mass 50kg Ascends A Flight Of Stairs 5m High In 5 Seconds. It's Acceleration Due To Gravity Is 10metre Per Second. The Power Expended Is?

Vocabulary
Fill in the blanks with the following words from the reading text. Change their forms when necessary. 1.highlight 2.ownership 3.residential 4. restriction 5.scheme 6. unveil Q1.  The local council unveiled new plans to build a gymnasium last week. Q2.  The one who offers the...

physics
Objects deep beneath the surface of the ocean are subjected to extremely high pressures. Some bacteria in these environments have adapted to pressures as much as a thousand times atmospheric pressure. How might such bacteria be affected if they were rapidly moved to the ...

physics
At what rate is a 60.0-kg boy using energy when he sprints up a flight of stairs 10.0 m high in 8.00 s? A. 75.0 W B. 48.0 W C. 735 W D. 480 W E. 4.80 kW

math
2. Write the decimal 0.063 as a percent. a) 0.63% b) 6.3% <-------------- c) 63% d)630% 3. A survey at your school found that 792 in 1,220 students have a cell phone. What percent of the students in school has a cell phone? Round to the nearest hundredth where necessary. a...

English
1. Jenny's friends're not angry. 2. Your friends're generous. (Are the contractions grammatical?) 3. Middle school is not the same as elementary school. 4. Middle school is not the same as elementary school is the same. (Does #3 mean #4? Is #4 the full form of #3? What is the ...

physics
A 60kg boy climbs 70 fligts of stairs each 20cm high in one minute how much powers is developed?

PE
What reason do studies show why more people with high blood pressure and diabetes live In the suburbs than in the city? 1.There are much better doctors in the city who treat those diseases more effectively. 2.(People re not as physically active and rely on cars more than those...

E.L.A
Which Idea Is Conveyed In Both "Dust Of Snow" and Who Knows If The Moon's A.Nature can be playful* B.Nature can be harsh C.Nature can be annoying D.Nature can be mysterious To Which Sense Do Both "Who Knows If The Moon's" and "Dust Of Snow Appeal Most Strongly A.Hearing B....

Math
The drama teacher is making costumes for the school play. Each costume requires 1 and 2/3 yards of material and 3/4 of a yard of ribbon. The material costs \$2.99 per yard and the ribbon costs 59 cents per yard. What is the approximate cost for 2 costumes A. \$11.95 B. \$5.65 C...

Health
1- what effect does a baby have on a teenage couple? A- brings the couple closer together B-school and education is unefected C-Mother drops out of school(my answer) D-physical maturity gets stronger

Math
Six of the classes at your school are going to the pool for swimming party that means 125 students need to get on buses in each bus holds 48 students how many buses with the school need?

Health
1-HIV positive people receive treatments to keep. A-their viral load as high as possible B-their viral load as low as possible(my answer) C- their viral load as equal to their t-cell count D-their t-cell count as low as possible

Health
1-Which f these methods are ineffective in protecting you from hiv? A-avoiding contact with blood B-Practicing abstinence C-sharing needles(my answer) D-avoiding alcohol 2-Samuel has engaged in high risk sexual behavior, but he feels fine. He thinks it's unnecessary to get ...

math
The data shown below shows the number of students in a school. Std 1 - 25 students std 2 - 20 students std 3 - 18 students std 4 - 17 students, If the school has 27 (2) seaters to seat all the students in the classes, how many (2) seaters are needed to seat all the students...

math
The data shown below shows the number of students in a school. Std 1 - 25 students std 2 - 20 students std 3 - 18 students std 4 - 17 students, If the school has 27 (2) seaters to seat all the students in the classes, how many (2) seaters are needed to seat all the students?

english grammar check my answer
Can you help with the parts of speech: am I correct? 1. The high school game is at home tonight. answer:(The ..article..high school ..adjective... game...noun..at..preposition....home..no​un....tonight...adverb) 2. The junior high track team is going to win when they ...

Chemistry
Would the percent yield of Ni(NH3)nCl2 be high, lower, or unchanged if you made the following procedural changes? a) You performed the synthesis reaction at 100 degrees instead of 60 degrees b) you dissolved the NiCl2*6H2O in 50 mL of distilled water instead of 10mL c) You did...

Calculus
In 1979, a biologist Reto Zach published a study on how crows drop whelks, a type of mollusk, from a height that minimized the amount of energy spent to break open the shells. Drop from too low a height, and the bird has to pick the shell up many times before it breaks. Drop ...

capital school
the hight of the hill is 50m calculate the velocity of the car

Related Rates
Gravel is being dumped from a conveyor belt at a rate of 10 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 25 feet high? Recall that...

Chemistry
My school notes say : pH < pOH is acidic pH > pOH is basic Is this correct, I was thinking that if the pH is less than pOH than it was a basic solution

English
1. We are on the school baseball team. 2. We are in the school baseball team. (Do we have to use 'on' in this sentence? What about "in"?) 3. Don't be angry with me. 4. Don't be angry at me. (Are both OK? Can we use both prepositions?)

3rectangular metal blocks,8 cm long, 6 cm wide & 5 cm high, were placed in an empty rectangular glass tank.water was then poured in until it reached a height of 10 cm. Another 5 similar blocks were put into the water so that it reached the brim of the tank. Assuming there was ...

math
A school debate team has 4 girls and 6 boys. A total of 4 of the team members will be chosen to participate in the district debate. What is the probability that 2 girls and 2 boys will be selected? A.3/7 B.4/10 C.1/14 D.1/210

3 rectangular metal blocks,8 cm long, 6 cm wide & 5 cm high, were placed in an empty rectangular glass tank.water was then poured in until it reached a height of 10 cm. Another 5 similar blocks were put into the water so that it reached the brim of the tank. Assuming there was...

There are 458 girls and 641 boys in a school hall. How many more boys than girls are there in the school hall?

William has been contracted to paint a school classroom. The classroom is 20 m long, 15 m wide and 5 m high. There are four windows (2m by 3m) and a door (2m by 1m). a) What is the cost of painting the ceiling at N\$ 6.50 /m²? [5 marks] b) What is the cost of painting the ...

Physics
A car drive straight of the edge of a cliff that is 54m high. The police note that the point of impact is 130m from the base of the cliff. How fast was the car travelling when it went off the cliff.

Physics
A car drive straight of the edge of a cliff that is 54m high. The police note that the point of impact is 130m from the base of the cliff. How fast was the car travelling when it went off the cliff.

physical science B
I have to build a roller coaster with 3 hills. Hill A is 15 inches high,it drops down to 3 inches, rises to 8 inches, drops again to 5 inches and rises a last time to 3 inches before dropping off. My question is when using a tennis ball as the car.. 1. What is the initial ...

Science
A car is traveling at 8.9 m/s (20mph) in a school zone. A child darts in front of the car. Ignoring reaction time, the car can accelerate (brake) at -4.57 m/s. -How long will it take for the car to stop? -How far will the car travel in that time?

Physics-Work, Energy, and Power
A 56.9 kg sledder descends an 8.21-meter high hill, encountering a friction force of 11.7 N, Fill in the blanks and determine the speed of the sledder after traveling the 31.7 meters to the bottom of the hill. Top of the hill: KE=0J PE=_ W=_ Work=_ PE=0J KE=_ At the bottom of ...

Math
A group of students were asked to select their preferred breakfast drink from among coffee, tea, and orange juice. The results of the survey are shown in the table along with information about whether the students are in high school (HS) or in college (C). Create a two-way ...

Social Studies
What are some examples of the Primordial School of thought ?(Donald Horowitz)

Creating High-Quality Centers
Which of the following statements concerning infants and music is true? A. Babies aren't instinctive music makers; instead, they need to be taught to create and respond to music. B. Lullabies are found only in cultures originating in Europe, so they might not be appropriate in...

Science
1. A ball is thrown 15 m/s at an angle of 60. How high does the ball go? 2. A ball rolls off a table going 8 m/s. If the table is 1.8 m tall, how far away does the ball land?

Science
A student rides his bike off the roof of the high school horizontally at 8 m/s that is 12.5 m high. 1. How far from the base does the object land? 2. What is his y-direction velocity just before it strikes the ground?

High School Geometry
Given: ∆AKL, AK = 9 m∠K = 90o m∠A = 60 ° Find: The perimeter of ∆AKL The area of ∆AKL 1/ AK perpendicular to LK 2/AL is the third side plz add answer and solution

Define table laying and state the importance of table laying

High School Geometry
Given: ΔTSP, TS = SP = 10cm, TP = 12cm. Find: Three altitudes of ΔTSP. for this one I only got one of the altitudes 2 √61 can you give me the other two and tell me if this one is right, sorry I am in a rush

High School Geometry
In isosceles ΔABC, AC = BC, AB = 6 in, CD ⊥ AB , and CD =√ 3 in. Find the perimeter of the isosceles triangle. Can u plz put answer and equation thanks, :)

psychology
"Lisa is 30 yrs old, married woman and mother of 4 children. She has various worries for years but has never before sought professional help. During the past three months she has become increasingly unhappy to the degree that her family physician finally suggested she seek ...

Chemistry
High-pressure sodium vapor lamps are used in street lighting. The two brightest lines in the sodium spectrum are at 589.00 and 589.59 nm. What is the diffrence in energy per photon of the radiations corresponding to these two lines?

science
1. Which is not a characteristic of the group 1 alkali metals? A. High densities B. Low melting points C. Found in batteries D. Silvery solid 2. which of the following is true of the group 2 alkali earth metals A. they are less dense that the group 1 alkali metals b. They have...

physics
A ball is fired at a speed of 8 m/s at 20˚ above the horizontal from the top of a 5 m high wall. How far from the base of the ball will the ball hit the ground? Also calculate the angle below horizontal the velocity vector makes.

Pre Calculus 30
1.How many positive four-digit integers can be formed that are even?9x9x9x5=3645 2.Three differently colored six-sided dice are rolled. In how many different ways can the dice turn up? 6x6x6=216 3.How many positive integers five-digit integers start with the digit 1?1x9x9x9x9=...

Math
How many square feet of wrapping paper do you need . To wrap a package it is 3.5 feet long 18 inches wide and 2 feet high

Math
A school is holding a Fixed Raffle, where only a certain number of raffle tickets can be sold.  The school sold 970 of these tickets for \$10 each.  One of the tickets will win \$2910, two tickets will win \$970, and 5 tickets will win \$485.   What is the expected value of ...

High School Geometry
The figures in (a) and (b) below are made up of semicircles and quarter circles; the figure in (c) shows a quarter of a circle in a square. Find the area and the perimeter of each figure in terms of Ï€. since I can't put a URL to the pic I will try to describe it 1/ a ...

math
there are 64 seventh graders at a middle school. This is 32% of the students at the school. The sixth graders comprise 38% of the school how many sixth graders attend the middle school

Science
1. The line on the graph below represents an object that is: A: Moving at a constant speed B: Increasing its speed C: Decreasing it's speed D: Not moving at all 2. To determine the acceleration of an object moving in a straight line, you must calculate the change in its speed ...

math
there were 825 pupils in a school. 52 percent were boys. more boys joined the school and the percentage of boys became 64 percent of the new total. how many boys joined the school?

keshavareddy schoolphysics
a body is released from the top of the tower Hmetres high. It takes t seconds to reach the ground .where is the body t/2 second after release

American Government
Which of the following is an example of protections under the establishment clause of the first amendment? a. A father objects to his son's school including a daily prayer b. An Amish family objects to a law requiring schooling until age 16 c. Restrictions are placed on the ...

Physics
A stone is thrown vertically upward with the velocity of 49.0 m/s. (a) how high will it travel before it starts to fall? (b) how many seconds will it take the stone to reach the highest point?

Algebra
Jameston High School has 2020 students. Its enrollment has been decreasing at a rate of 125 students per year. Townsville High School has 1075 students. Its enrollment has been increasing at a rate of 80 students per year. Assuming the enrollment rates continue: A. Write an ...

Statistics
A physical fitness association is including the mile run in its secondary-school fitness test for boys. The time for this event for boys in secondary school is normally distributed with a mean of 450 seconds and a standard deviation of 40 seconds. If the association wants to ...

Esol
which sentences is right? The team want to go to the next game early for tryouts.. The team crowded around its coach to hear the last play..the school board set its reserved blue seats in the rain...the opposing team's coaches used its last timeout third quarter...the crowded ...

math
A rock is thrown upward with a velocity of 25 meters per second from the top of a 50 meter high cliff, and it misses the cliff on the way back down. When will the rock be 7 meters from the water, below?

Math 115
While solar energy powered home systems are quite expensive to install, adding some passive energy features to conventional construction can make a substantial reduction in heating and cooling costs. Passive solar requires no machinery and uses the building itself to collect, ...

Math
While solar energy powered home systems are quite expensive to install, adding some passive energy features to conventional construction can make a substantial reduction in heating and cooling costs. Passive solar requires no machinery and uses the building itself to collect, ...

physics
In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 17 m/s at an angle of 39 ∘ above the horizontal. How long does it take for the ball to reach the wall if it is 3.8 m away? How high is the ball when it ...

math
A 12-meter high post casts a 19-meter shadow. Find the angle of elevation to the sun. -what is/are given? -formula used -solution

math
A hiker is 400 meters away from the base of the radio tower. The angle of elevation to the top of the tower is 46 degrees . How high is the tower?

Math
While solar energy powered home systems are quite expensive to install, adding some passive energy features to conventional construction can make a substantial reduction in heating and cooling costs. Passive solar requires no machinery and uses the building itself to collect, ...

Math
What is the volume of a fish tank measuring 50 centimeters long 30 cent wide and 35 cent high

Chemistry
Iron pyrite (FeS2) is the form in which much of the sulfur exists in coal. In the combustion of coal, oxygen reacts with iron pyrite to produce iron(III) oxide and sulfur dioxide, which is a major source of air pollution and a substantial contributor to acid rain. What mass of...

ELA
This is the poem question 1 is talking about. Full fathom five thy father lies; Of his bones are coral made; Those are pearls that were his eyes; Nothing of him that doth fade But doth suffer a sea change Into something rich and strange. Sea nymphs hourly ring his knell Ding-...

SCIENCE HELP
a bristlecone pine in the white house usually adds a new ring when which of the following occurs? a. earths daily rotation is complete b. the full moon causes a monthly high tide c. the new moon is visible from earths surface d. earths northern hemisphere is titled toward the ...

Earth Science
Slide 1 This is a cumulus cloud. Can you find four things on the word list that you can use to describe this cloud. Cumulus clouds consists of puffy tops, no rain expected, 3,000 ft. high, and flat bottoms. Slide 2 This is an example of towering cumulus clouds. Write down as ...

Science and Hurry!
What causes land breeze and sea breeze? A) The differential heating of land and sea by the Sun results in the movement of air. B) Hot air from the sea blows over the land because there is a high pressure area over the sea. C) Cold air blows from the land over the sea because ...

Math
From the top of a tower,the angle of depression of a boat is 30degree if the tower is 20cm high how far is the boat from the foot of the tower

Some Polynesian islands are ring-shaped coral islands that surround a body of water, or (1 point) • copra. • coral. • atolls. • plates. 2. In the mid-1800s, what event played a part in the large increase in British immigration to Australia? (1 point) • Aborigines ...

fluid
1. A vertical seawater lock is 4m wide and 2m high. The water level is 2 m above the base of the lock on one side, there being no water on the other side. The mass of the lock is 2.5 t and the coefficient of friction between the lock and the slides is 0.25. Determine the ...

maths
A school is organising a pen holder making competition using cardboard, if the pen holder is in the shape of a cylinder having base of diameter 28 cm and height 60 cm .If there are 35 competitors, then how much cardboard is required?

Math , plz help!!!!!!
A typical Stone on the lowest level of the Great Pyramid in Egypt was a rectangular prism 5 feet long by 5 feet high by 6 feet deep and weighed 15 Tons. what was the volume of the average Stone?? how much did one cubic foot of this stone weigh???plz help this is an emergency ...

science
What the lines making a circle around the high-pressure area indicate. please sombody help