# suppose a map is scaled so that a half inch represents 25 miles. how many inches of the map represents 87 1/2 miles?

35,906 questions, page 124-
## math

d=1.3times square root of h how high(to the nearest foot) would a platform have to be to see a distance of 15.5 miles?

*asked by lisa on December 14, 2008* -
## math

How many minutes are needed to make a 30 mile trip at an average speed of 20 miles per hour?

*asked by Jas on April 2, 2008* -
## math

A bicycle trip starts at 2:00 p.m. and ends at 5:45 p.m. If the cyclist travelled 86.3 miles, what was his/her average velocity?

*asked by qwenie on April 28, 2016* -
## MATH

How to solve for time? total of 800 miles, driving an average speed of 55 mph?

*asked by TROY on March 1, 2009* -
## math

A car travels at a constant speed of 56 miles per hour. How far will it travel in 45 minutes and 45 seconds?

*asked by Anonymous on February 8, 2017* -
## math

a car travelved a distance of 195 miles in 3 hours 15 minutes what is the unit rate

*asked by jane on April 19, 2014* -
## Algebra

Im to write a function,that showsthe total cost of b(x) to rent a car driven (x)miles

*asked by Jeff on January 21, 2016* -
## math

an airplane travels 750 miles in 1 hour and 45 minutes. what is the average velocity of the plane?

*asked by ricky on April 13, 2016* -
## chemistry

The escape velocity from earth is 2.5 x10^4 miles per hour. What is this speed in m/s? (1 mile 1609 m)

*asked by Nancy on April 14, 2013* -
## math

I'm wondering if someone could check my work please? I have a table: Distance driven in miles Total Cost 0

*asked by Carly on October 14, 2017* -
## Chemistry

If I average driving 60.0 miles/hour when traveling (including stops and sleeping) how far can I get in 3.5 days?

*asked by Emmy on August 17, 2009* -
## Chemistry

If your car gets 28 miles to the gallon, how many liters of gasoline are necessary to travel 112km? I need the answers so badly. Thank you very much.

*asked by Chen on July 14, 2015* -
## math

Zaid will travel from Boston to Washington, D.C. If the trip is 600 miles, about how fast will he have to go to get there in 10 1/2 hours?

*asked by Anonymous on May 20, 2013* -
## business

In recent years, Juresic Transportation purchased three used buses. Because of frequent turnover in the accounting department, a different accountant selected the depreciation method for each bus, and various methods were selected. Bus Acquired Cost

*asked by vivian on November 6, 2010* -
## math

In recent years, Juresic Transportation purchased three used buses. Because of frequent turnover in the accounting department, a different accountant selected the depreciation method for each bus, and various methods were selected. Bus Acquired Cost

*asked by vivian on November 6, 2010* -
## PHYSICS PLEASE HELP!

A crowbar lever , with a 3 inch long nail remover connected to a 20inch handle. If you push down on the handle end with a force of 40 N, what force is available to remove a nail? HINT: a Crowbar isnt all that different from a seesaw, except the pivot is

*asked by Anonymous on December 13, 2012* -
## astronomy

Compare the light gathering power of a telescope with a 10-centimeter(about 4-inch) diameter mirror to that of the human eye. (Take a diameter of the pupil of the eye to be about 5 millimeters) Wouldn't the power be related to the AREA of the optical

*asked by Dhawal on April 17, 2007* -
## Physics

A crowbar lever , with a 3 inch long nail remover connected to a 20inch handle. If you push down on the handle end with a force of 40 N, what force is available to remove a nail? HINT: a Crowbar isnt all that different from a seesaw, except the pivot is

*asked by Anonymous on December 13, 2012* -
## PHYSICS PLEASE HELP

A crowbar lever , with a 3 inch long nail remover connected to a 20inch handle. If you push down on the handle end with a force of 40 N, what force is available to remove a nail? HINT: a Crowbar isnt all that different from a seesaw, except the pivot is

*asked by Anonymous on December 17, 2012* -
## Math College 115

According to a 2010 Kaiser Family Foundation report, during 2009 spent almost every waking hour outside of school using electronic devices such as iPhones, computers, or televisions. Those aged 8 to 18 spent an average seven and a half hours a day in 2009

*asked by Diora on August 28, 2016* -
## Math

2.You are trying to decide how to most efficiently use your oven. You do not want the oven running at a high temperature when it is not baking, but you also do not want to waste a lot of time waiting for the oven to reach the desired baking temperature.

*asked by Renee on May 22, 2008* -
## physical geography

How many time zones extend across Russia, from Kaliningrad to the Bering Strait? What is the central meridian for: a-Pacific standard time (PST)? b-Eastern Standard time (EST)? c-The irregular time zone that includes India? d-The time zone that includes

*asked by mike on January 27, 2007* -
## Math

Carlos baked a dozen cupcakes for the village fete.Half the cakes had pink icing and half had blue icing. Two of the cakes with blue icing and 3 cakes that had pink icing had a cherry on top. The rest of the pink cakes and 1 of the blue cakes had chocolate

*asked by Demian on July 27, 2017* -
## Chemistry

Suppose you had a mixture consisting of 20.0 g of compound A and 20.0 g of compound B dissolved in 100.0 mL of water at 95 degrees C. Suppose further that only 1.00 g of A are soluble in 100.0 mL of water at 5 degrees C but 15.0 g of B are soluble in 100.0

*asked by Lila on September 16, 2010* -
## Math

For small paving jobs, a contractor uses a roller pushed by a worker. A roller pushed by a worker (radius=8 in; length=30 in.) To the nearest square inch, what is the area of pavement with which the surface of the roller will come into contact in one

*asked by Tehila on April 22, 2010* -
## math

Please help! :) Garden measures 30x20 Border has a width of x (I've already solved the first part of my problem, in that the width is 3) Border needs to be covered to a depth of 3 inches. Pine bark costs $29 per cubic yard. What will the material cost to

*asked by Jo on May 10, 2011* -
## math

Please help! :) Garden measures 30x20 Border has a width of x (I've already solved the first part of my problem, in that the width is 3) Border needs to be covered to a depth of 3 inches. Pine bark costs $29 per cubic yard. What will the material cost to

*asked by Jo on May 10, 2011* -
## Math

You use a scale of 1 inch equals 280 feet to build a model of the great pyramid of guys that the width of the base of the pyramid is 756 feet what is the width of your model

*asked by Anna on January 14, 2019* -
## Algebra

Select the answer choice that most accurately evaluates whose equation is correct. Tania is partially correct. The amount of money Thu makes, y, is equal to the product of the number of jars he sells and 12, but she is correct that the booth fee is not a

*asked by Mai on January 29, 2018* -
## math: algebra

I need help checking my answer. I wasn't sure if 8 and 8 were both side lenegth's or if 22 is the slant height but I think it is got kind of confused there also wasn't sure how I was suppose to solve it but I sloved the problem how I though it was suppose

*asked by meep on March 5, 2015* -
## Statistics

Can someone help with these questions. I did majority of the work. but some i need help with. Are the mean number of times a month a person eats out the same for whites, blacks, Hispanics and Asians? Suppose that Table 13.26 shows the results of a study

*asked by Davina on May 5, 2016* -
## Math

A no. Plus two-third of itself plus one half of itself plus one-seventh of itself equals 97.find the no. Ans is42

*asked by Simran kaur on November 4, 2012* -
## Algebra

I had to factor 5x^3-10x^2+43x-6. I got 5x(x^2+-2x)+3(x-2). My teacher said this was half right. What did I do wrong then? Thank you!!

*asked by Amelie on September 22, 2009* -
## physics

Who does more work if your friends pushes a something four times further than you with half the force?

*asked by Joanna on October 1, 2009* -
## chemistry

why half cell reactions are given in reduction reations by IUPAC?

*asked by sadaf on November 27, 2016* -
## math

Subtract six and one-half minus four and seven-tenths. Justify your steps.

*asked by cha on May 7, 2012* -
## physics

a satelitee breaks in half while in circular orbit about the earth

*asked by michelle on October 21, 2010* -
## Chemistry

The half life for a first order reaction is know to be 4.5 h. How long will it take for 85% to be decomposed, in h?

*asked by Paige on December 7, 2011* -
## chemistry

how many half-lives of radon-222 have passed in 11.46 days?

*asked by Jerry on May 23, 2011* -
## ALGEBRA

SOLVE FOR THE VARIABLE 9/2m - 6 = -3 1/2 + 4m nine halves m minus 6 = negative 3 and a half + 4m thank you

*asked by JUDE on January 6, 2016* -
## SOCIAL STUDIES

WHAT 2 AQUIFERS PROVIDE THE WATER SUPPLY TO HALF THE PEOPLE IN NJ

*asked by JAKE on October 31, 2010* -
## Chem

What percentage of sodium-24 with a half life of 15.0 hr would remain after 60hours?

*asked by Sarah on April 29, 2010* -
## chem

How long does it take for 10.0 g of a radioactive isotope to decay to 1.25 g if its half-life is 17.0 d?

*asked by bekah on September 19, 2014* -
## algebra

solve a number is one half of another .find the numbers if their difference is 17.

*asked by kattie on January 3, 2011* -
## math

I am less than 100. The sum of my didgits is 4. Half of me is an odd number.

*asked by jack on March 28, 2011* -
## trig

Use a half-angle formula to find the exact value of cos 5ð/12

*asked by Steve on December 16, 2009* -
## science

after six half-lives what percentage of a radioactive sample will remain? a) 0%-1% b) 1%-3% c) 3%-6% d) 6%-10%

*asked by victoria on December 9, 2013* -
## Algebra 1

One third the sum of two numbers is 10 and half the difference is 14. What is the larger number?

*asked by Dion on April 5, 2016* -
## Social Studies

This Canadian landform covers about half of the country. Need help? confused.

*asked by Sofia on June 14, 2015* -
## Chemistry

need help to balance half reaction in basic solution IO3 to I2

*asked by Shana on July 27, 2013* -
## math

If it says write the equation, five less than half a number is forty would the answer be 1/2n-5=40

*asked by Jenn on January 7, 2016* -
## Maths

half of the sum of two number is 7,while one third of their product is 16,find the numbers

*asked by Eze GDSS on June 1, 2016* -
## College Calculus

What is the integral of cos^6x? I tried half angle identities but it didn't really help...

*asked by Matt on February 18, 2008* -
## 5th grade

if 8 ciybters are ib wgike, then wgat us half? i f9 counters te one hole, then what is one /third ?

*asked by pat on October 26, 2010* -
## Math

Use a half angle formula to determine the exact value of sin 7(pi)/12.

*asked by David M. on April 28, 2010* -
## MATH

Subtract six and one-half minus four and seven-tenths. Justify your steps

*asked by cha on May 8, 2012* -
## science

how many years will have to pass before only 3% of radioactive isotope is left if there is a half ye

*asked by edward on September 9, 2015* -
## Math

Write an expression to represent this situation (Four less than half a number???)

*asked by Luna on April 15, 2019* -
## calculus

Find limit as x goes to infinity of (6x-(1/4x))/(3x-(1/x))? one half –4 negative one fourth 2

*asked by Anonymous on December 8, 2016* -
## Heat and property matter

When a gas in a container is squeezed to half its volume,its density

*asked by Hammed on April 23, 2015* -
## Math

A turkey weighs 40 pounds plus half of its weight. What does it weigh?

*asked by Sidney on February 11, 2016* -
## physics

7/8 part of a substance decays in 45 days what is its half life

*asked by abi on February 5, 2014* -
## Math

Find an expression for the function. Top half of the circle: x^2+(y-2)^2=4.

*asked by KC on September 10, 2012* -
## chemistry

write the balanced half reaction for the conversion of Cl2(g)to Cl-(aq)

*asked by amethyst on May 11, 2008* -
## chem

can you explain half - equations and oxidation and reduction and how they are linked

*asked by anonymouscientist on November 15, 2011* -
## Geography

What political changes swept through Europe during the second half of the twentieth century?

*asked by Craig on January 9, 2012* -
## chemistry

How to solve CoCl2+HO2- ------> Co(OH)3+ Cl- by half reaction method

*asked by Pratik Rathi on July 28, 2016* -
## math

nine friends each get 1 half of a candybar. How many bars are there? show your work.

*asked by rauline on March 14, 2015* -
## MATH

How do I round 14 hours and 54 minutes to the nearest half hour?

*asked by TROY on March 1, 2009* -
## question!

What are the operating times at Jiskha when I can actually get a response within half an hour?

*asked by Hannie on October 29, 2008* -
## Math

negative three and a half is amember of which subset of real numbers?

*asked by anonymoue on January 19, 2011* -
## chemistry

If 6.90 g of (half-life = 5.30 y) are allowed to decay, how many grams would be left after 1.00 y and after 10.0 y?

*asked by Kerrie on May 8, 2009* -
## science

write the balaced half-reaction for the conversion of Fe(s) to Fe2+(aq)

*asked by amethyst on May 10, 2008* -
## math

The average of 1/5 and other two numbers out of which one is the half of the other is 1/4. What is the smallest fraction out of unknowns.

*asked by Anna on January 23, 2019* -
## chemistry

a piece of silver cut in half,density stays the same.Why?

*asked by Anonymous on December 3, 2007* -
## Math

Use the half formula to find the exact value of the expression sin 22.5

*asked by Cassie on November 19, 2007* -
## chemistry

I need the half reactions for this redox reaction: 2KClO3-----> 2KCl + 3 O2

*asked by donna on June 9, 2013* -
## Riddle

If it were 2 hours later than it is right now, it would be half as long until midnight as it would be if it were an hour later than right now. What time is it?

*asked by Steve on January 20, 2010* -
## Math

Subtract six and one-half minus four and seven-tenths. Justify your steps.

*asked by Noemie on November 24, 2015* -
## math

in a division sum dividing by 8 ,any remainder must be(a) more than 8,(b) half of 8,(c)less than 8,(d)equal to 8

*asked by wan on October 20, 2012* -
## Chem

Write the balanced overall reaction from these unbalanced half-reactions ln--->ln^3+ Cd^2+--->Cd

*asked by Joe on April 17, 2014* -
## Science

if the wood in the bowl contains only 1/16 of its original C-14, then its age is four half-lives of C-14.

*asked by Anthony on December 13, 2012* -
## math

write an algebraic expression representing three less than half a number

*asked by alexis on March 6, 2011* -
## arithmetic

find the cost of 100g rice at 95p per half kg

*asked by Anonymous on January 16, 2012* -
## science

calculate pressure on surface of tank of 3*2*2 cm if it is half filled

*asked by adomeo on September 17, 2011* -
## Math

Divide 30 by half and add 10. What do you get? I think it is 70, but my friend disagrees. He thinks it's 12.

*asked by Erin on April 29, 2009* -
## math

5 is half of my factor. the sum of my digits is four. i'm between 30 and 100. what number am i?

*asked by lia on May 8, 2013* -
## Math

P= P(initial)(1/2)^(t/80) I found Half-line:80 P=Pinitial(e)^(rt) i cant seem to find what r is. Help

*asked by Priscila on April 9, 2017* -
## college

If a single bacteria divides in half every 20 min. how many would you have after 42 hours?

*asked by Christina on February 6, 2010* -
## chem

La(s) ¨ La(OH)3(aq) (basic solution) Complete and balance the following half-reactions

*asked by sarah on April 11, 2013* -
## math

write an algebraic expression representing three less than half a number

*asked by alexis on March 6, 2011* -
## math

one half gallon equals ----- quarts. i think it 2 gallons can you correct me please?

*asked by AA on September 22, 2008* -
## Trig

How do i find the exact value of sin 15 using the half angle formula

*asked by Briana on April 13, 2012* -
## jiskha

is this all free my parents don`t half to pay any thing???

*asked by Larry on May 2, 2016* -
## math

write each mixed number as a decimal.3 and seven tenths. 4 and one half how??

*asked by sam on May 15, 2013* -
## chemistry

What is the half-life of an isotope if it decays to 12.5% of its radioactivity in 18 minutes?

*asked by fatin on September 14, 2010* -
## 3rd grade

I am less than 100. The sum of my digits is 4. Half of me is an odd number.

*asked by Skyshun on April 20, 2010* -
## Trig

Use the half-angle formula to simplify (sin4theta)/(1+cos4theta)

*asked by Sade on October 17, 2016* -
## math

divide 15 into thirds and subtract form 14 divede into half?

*asked by Anonymous on March 30, 2016* -
## geology

What are the major differences between topographic and geologic maps? • Refer to Figure 9.21 on p. 264 of the text. How would you determine the slope of the land surface in this figure? If you consider building a house in a location in this area, what is

*asked by Anonymous on May 10, 2010*

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