We are
now going
to solve
real world
problems
The speed of light is 3 x
108 meters/second. If the
sun is 1.5 x 1011 meters
from the earth, how many
seconds does it take light
to reach the earth?
Express your answer in
scientific notation.
A circular swimming pool holds 1.22 x 106 cubic
inches of water. It is being filled at the rate of
1.5 x 103 cubic inches per minute. About how
long will it take to fill the swimming pool?
5
Terry bought 2
8
pounds of grapes
that cost $2.00 per
pound.
 What was
the total cost of the
grapes?
The radius of a circle with area
A is approximately A
3
If a pizza has an area of 78
square inches, estimate its
radius.
Michael deposits $20
into his savings account
each month. He wants to
increase the amount he
deposits by 25% each
month until he is
depositing at least $50
per month. In what
month will he deposit at
least $50?
Colin is borrowing money from his parents to purchase
a $700 computer. He will pay them $35 per month for
two years. Determine the simple interest rate on Colin’s
loan.
The projected number of household trips in 2010 is
50,000,000. About 14,000,000 of these trips will
involve air travel. What percent of the trips will
involve air travel?
Students receive a
20% discount off
the price of an
adult ticket at the
movies. If a
student ticket is
$6.80, find the
price of an adult
ticket.
In the United States,
the average height of
3
a 9-yea- old girl is 53
4
inches.

The average height
of
a 16-year-old is 64 1
5
inches. How much
does an average girl
 age 9 to age
grow from
16?