chemistry
A car uses 114 g of petrol to travel one mile. Calculate the mass of carbon dioxide produced when this car travels one mile.
math
Some years in the 20th century have 4 different odd digits. How many of those years have the sum of the digits greater than 20?
Math
Bill earns 1 dime the first day, 2 dimes the second day, 3 dimes the third day, 4 dimes the fourth day, etc. How many days will it take him to earn $2.
5th grade math
mrs jones wrote 8 personal letters and addressed 8 envelopes to 8 different people. she placed each letter in an envelope, but when she got to the last one for Judy Ogg she had an envelope for Sheri Ford. What is the minimum number of envelopes she would have to open to correc...
Math
what is the point of intercept for 30x+50=25x+75 using the equal values method
math word problems
This year Jerry is half as old as his dad and 1/3 the age of his grandfather. If the sum of their ages is 132, how old is Jerry?
Math
In traveling to Greece Jim found the exchange rate to be 148 drachma equal to one American dollar. He bought 3 of the same prices items and spent almost $10 American. What was the maximum amount of drachmas for each item?
Math
In traveling to Greece Jim found the exchange rate to be 148 drachma equal to one American dollar. He bought 3 of the same prices items and spent almost $10 American. What was the maximum amount of drachmas for each item?
Math
Derek had a square box lid and 10 marbles. He placed all 10 marbles along the inside walls of the lid and had an equal number of marbles on each of the four sides. How many marbles were on each side?
5th grade math
adam read a 360 page book in 3 days. he read twice as many pages on the middle day as he did on the first day or last day. How many pages did he read on the LAST day.
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