Answer:
The answer is 314cm²
the formula for the sphere area of a sphere is:
A= 4TT²
A = 4x3.14x5²
first solve for exponents
A = 4x 3.14x25
then multiply
A = 314cm²
28 times 1/7 would give you 4
<span>The
associative rule is a rule about when it's safe to move parentheses
around. You can remember that because the parentheses determine which
expressions you have to do first--which numbers can associate with each
other. It looks like this:
For addition: (a + b) + c = a + (b + c)
For multiplication: (ab)c = a(bc)
The commutative property is about which operations you can do backward
and forward. You can remember this by thinking of people commuting to
work: they go to work every morning, then they repeat the same operation
backward when they commute home. It looks like this:
For addition: a + b = b + a
For multiplication: ab = ba
Finally, the distributive property tells you what happens when you
distribute one operation against another kind in parentheses. It looks
like this:
a * (b + c) = ab + ac
In other words, the a is "distributed" over the b and c.
Of course, you can make these work together:
a * (b + (c + d))
= a * ((b + c) + d) (by the associative property)
= a * (d + (b + c)) (by the commutative property)
= ad + a (b + c) (by the distributive property)
= ad + ab + ac (by the distributive property again).
Hope this helps. </span>
Answer: There are 60 different ways that he can arrange the books.
Step-by-step explanation:
Since we have given that
Number of computer science books = 5
Number of math books = 3
Number of books selected = 4
Atleast Number of computer science = 2
Atleast number of math book = 1
According to question, he wants at least two computer science books and at least one math book, and he wants to keep the computer science books and the math books together.
So, Number of different ways that he can arrange the books is given by
Hence, there are 60 different ways that he can arrange the books.