8. SAFE is a rhombus,as shown in the figure AO= 12 cm , OF=9cm .Find x,y and z.
Justify your findings.
Answers
Step-by-step explanation:
Seconds to Minutes
One day, Ally decided to time how long she could hold her breath. She counts up to
150
seconds
. If Ally wants to know how long she can hold her breath for in minutes, how can she change seconds into minutes?
Let's use the fact that there are
60
seconds
in a
minute
. These are the unit rates:
60
seconds
1
minute
1
minute
60
seconds
Better yet, they are equal, and we call them proportions.
Now we can find out how long Ally can hold her breath.
When converting different units of measurement, in this case seconds to minutes, it is important to set up the ratios correctly. A trick to knowing if you set up the ratios correctly is by checking if your units cancel each other out. Treat the ratios exactly how you treat fractions. If you have the same thing in the numerator (top) and the denominator (bottom), they can cancel each other out.
When setting up the ratios begin with what you are being asked to convert. In this case we will find the amount of
minutes
that are in
150
seconds
.
150
seconds
×
1
minute
60
seconds
=
?
?
?
minutes
Notice the units! Because there are seconds in the top and the bottom of the fractions, they cancel each other out. Since the only unit remaining on the left side of the equation is minutes, we know we set the problem up correctly and can solve for the number of minutes Ally can hold her breath.
150
seconds
×
1
minute
60
seconds
=
2.5
minutes
Thus, Ally can hold her breath for
2.5
minutes
or
2
minutes
and
30
seconds
.
If we wished, we could also convert between minutes and hours or minutes and days. We can use the same procedure to convert between any units.