Answers created by David Drayer
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Nehemiah makes $82,000 a year. What is the maximum amount he can afford for a mortgage each month?
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How are polyatomic ions named?
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What industries separate mixtures?
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How do you read box and whisker plots?
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Suppose you have 76 feet of fencing to enclose a rectangular dog pen. The function #A = 38x - x^2,# where x = width, gives you the area of the dog pen in square feet. what width gives you the maximum area?
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State the difference between a physical change and a chemical change, and list three indications that a chemical change has occurred. Which indication is most suggestive of a chemical reaction?
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What is produced when an acid reacts with water?
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What happened after British soldiers killed five colonists in the Boston Massacre?
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Which of the following are you most likely to find in the earths crust: The silicates feldspar and quartz or the non-silicates copper and iron?
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What is the apparent rising and setting of the sun as seen from Earth caused by?
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What is the relationship between Plate tectonics and mountain formations/earthquakes/volcanoes?
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How are convection currents important in the earth system?
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How do we know what happens at the event horizon of a black hole?
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How is the energy emitted by a quasar measured?
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The rate at which the universe expanded right after the Big Bang was higher than the speed of light. How is this possible? Also, if the expansion of the universe is accelerating, will it ever surpass the speed of light?
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Why does gravity affect time?
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Where do the majority of hurricanes develop?
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A store sells different colored pens. The circle graph below represents all pens for sale at the store. There are 200 black pens for sale at the store. How many blue pens are for sale at the store. In circle graph (black pens:40%, blue pens:35%) ?
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A lakefront lot purchased 2 years ago for $30,000 is now worth $35,000. Assuming the appreciation is linear, what is the equation that gives the value of the lot at any time #t# in years?
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How might a prolonged drought in a region affect renewable water resources and the economic activities that depend on those resources?
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A city known for its temperature extremes started the day at -5 degrees Fahrenheit. The temperature increased by 78 degrees Fahrenheit by midday and then dropped 32 degrees by nightfall. What expression can you write to find the temperature at nightfall?
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How can seafloor spreading be detected?
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How does geology affect our daily life?
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Between which two consecutive integers does #√79.5# lie?
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100 bushels of corn are to be divided among 100 persons. Men get 3 bushels each. Women get 2 bushels each. Children get 1/2 bushel each. How will the bushels be distributed? Can you please help me do this question?
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Three times the smaller of two consecutive even integers is six less than six times the greater number. What are the integers?
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How do you write #213# in scientific notation?
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How do you read #5/8# as a ratio?
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Why must Kelvin temperatures be used in calculations that involve gases?
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What is the function of a food pyramid?
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Who founded the Maryland colony?
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What compounds are responsible for the following to be either a base, an acid or neutral?
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Who made up the Bonus Army that marched on Washington?
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What are periodic table groups and what do they represent?
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What is a pv diagram?
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How do you convert 0.0036 into scientific notation?
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What ionic form is phosphorus found in?
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What are similarities and differences between renewable and non renewable energy resources?
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How do volcanic eruptions affect air pollution?
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Why do covalent bonds form between atoms?
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What is the maximum number of electrons in the second principal energy level?
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Why did people settle in the Fertile Crescent? Why was it a good spot?
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What the symbol for an element that is a noble gas?
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What was the main provision of the Wade-Davis Bill of 1864 that led Lincoln to "pocket veto"?
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What is the equation for this reaction: Carbonate + Sulfuric Acid?
CO3−2 and H2SO4
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What were the conditions like in early earth's shallow oceans or "primordial soups"?
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What does the prefix auto mean?
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What are some ways in which people can conserve natural resources?
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What are some factors that contribute to the constancy or change of a species' traits?
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Why is ionic bonding stronger than covalent?
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Cambridge AS Level English Language?
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What is a polar molecule?
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Which of the following define(s) carbon element?
I. It has a crystalline lattice structure.
II. Coke and diamond are allotropes of carbon.
III. It takes oxidation states between -4 and +4
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How can trophic levels be deduced?
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What are some examples of inorganic compounds and organic compounds?
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Fuji apples cost $3 per pound and Golden Delicious cost $2 per pound. A childcare center purchases 30 pounds of apples for $80. How much of each kind did they buy?
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How does chemistry relate to biology?
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Can an unstable nucleus increase it's nuclear mass by fission?
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Why is there often more consumer biomass than producer biomass in aquatic ecosystems, compared to land ecosystems where there is more producer biomass?
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Why can the removal of one important species affect an entire ecosystem?
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A car seller buys a car from a manufacturer for $10,000. He increases the cost by 5 percent. What is the markup amount?
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How do you solve #x/4 - 4/x=0#?
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How do termites demonstrate endosymbiosis?
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What is the role of atp?
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What is the oxidation no. of Cl in FeCl3.H20?
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Sarah bought a 55-yard bolt of ribbon. lf she wants to cut pieces that are 1 1/3-yard long, what is the maximum number of ribbons she can cut from the bolt?
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When was the theory of William Hartmann first set out?
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Why is water pollution a serious problem?
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How does poverty in developing countries affect the environment?
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How does the type of crust affect convergent boundary movement?
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What is an insertion mutation?
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Why would limiting population size help the quality of life?
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How does concentration effect Le Chatelier's principle?
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What is the verb phrase in the sentence, "She should not have borrowed my dress!"?
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How do you solve #-1/2(b+2)+3b=-1#?
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Why is it that oniy part of the energy stored in one trophic level is passed on to the next level?
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How does erosion affect igneous rocks?
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How do you solve #\frac { 1 } { 4 } + \frac { 1 } { 5 } = \frac { 1 } { t }#?
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Why are there gaps in the fossil record?
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What is the spin of electron in atomic hydrogen? Clockwise or anticlockwise.
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What is the amount of time required for half of a sample of radioactive isotope to break down and form a daughter isotope?
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How can water be produced by metabolism?
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How does the Fibonacci sequence relate to real life?
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What are chemical reactions that require oxygen called? What are those that do not require oxygen considered?
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How do you solve the system of equations #2x - 9y = - 10# and #4x - 9y = - 2# by graphing?
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How can knowing the GCF and LCM help you when you add, subtract, and multiply fractions?
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How do you convert 8956.56 and 0.000682 into scientific notiation?
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Is unit conversion easier with the metric system?
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What is the name of the family that are likely to form solutions with a pH greater than 7 which are bases?
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Four balls of wool will make eight knitted caps. How many balls of wool will Malcolm need if he wants to make six caps?
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Which situation would NOT cause the following equilibrium reaction to shift to the right?
The forward reaction is endothermic.
#"N"_2"O"_4(g) rightleftharpoons 2"NO"_2(g)#
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Is absorbing solar energy during photosynthesis, considered as an endothermic reaction?
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How to start studying biology?
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If our bodies are always regenerating new cells why do we grow old and die?
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Carbon monoxide binding to hemoglobin is an example of a permanent competitive inhibition. How would hemoglobin be affected by the increasing concentration of oxygen?
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What is the effect of adding more water to the following equilibrium reaction? #CO_2 + H_2O rightleftharpoons H_2CO_3#?
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What kind of plant provides most of the soft wood lumber used for construction?
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What is an example of a halogen?
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How do you solve #-25x - 15\leq - 20x - 7#?
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Why did Theodore Roosevelt get Congress to pass the Hepburn Act?
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