Notesale: Turn your study into money

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Ch
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7 notes Page 1 of 5

Ch2
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Mixture problems: th

th

Distance problems: th

hh

Interest problems:

ah

hh

a

r ahta

t a ar at
浔 hhtar

d=rt

p=br
th

hh

I=prt

Ex1) a) If a chemist has 40L of a 35%acid solution, then the amount of pure acid in the solution
is?

b) If $1,300 is invested for one year at 7% simple interest, the amount of interest earned in
the year is?

c) Find the annual interest if $5,000 is invested at 4%
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2
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How many liters of the 70% acid solution should be used?

b) A certain metal is 40% copper
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2
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To
earn $790 per year in interest, how much should she invest at each rate?

b) Anna invested part of the money in a certificate of deposit at 4% and $3,000 more than that
amount in a bond paying 6%
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How much did Anna invest at
each rate?

Ch
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7 notes Page 4 of 5

Ex4) a) A bank teller has 25 more $5 bills than $10 bills
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How many of each denomination of bill does she have?

b) A man has $2
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He has 9 more nickels than quarters
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77sec, what was his speed in meters per second?

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7 notes Page 5 of 5

b) If 66
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One
travels at a constant speed of 55mph, and the other travels at a constant speed of 63mph
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One heads south to New Orleans, the other
heads north to Chicago
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In
½hr, the planes are 275mi apart

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