Let's make the first even integer m and the second even integer n. The square of the first, decreased by the second is 130 is:

-n=130 ---> Add n to each side

=130+n ---> Take the square root of each side
m=±

Let's look at the first square number above 130, which is

. <em>m</em> is 12, therefore the next consecutive even integer is 14.

=144
144-14=130
The two consecutive integers are 12 and 14
When you multiply or divide a whole number by a power of ten just add the zeros. 5 to the 100000 power is 500000. Five zeros. Hope this helps. Just a little trick and pattern I noticed which helps. :)
Question 2 is 19.4 I hope I helped!
Answer:
6.5 ft
Step-by-step explanation:
When we draw out our picture of our triangle and label our givens, we should see that we need to use cos∅:
cos57° = x/12
12cos57° = x
x = 6.53567 ft