You can use it by just multiplying and moving the decimal.
<span>The roof is higher than the ladder can reach
10^2-1.5^2=h^2
h=sqrt(100-2.25)=9.89 feet
distance to the roof= 12-9.89</span>
<span>The difference between two integers is at most 16
x1 - big integer
x2- small integer
</span><span>the smaller integer is 12
so
x2 = 12
substitution
</span>
<span>
solve for x1
however, note the fact larger
thus meaning
x1 > x2 applies to this problem
</span>
Calleigh should put in 30 pennies
5×21/-1+9
105/-1 +9
-105 +9
-96
hope that helps