Answer:
Sanchez bought 20 books.
Step-by-step explanation:
Represent the total number of books purchased by t. Then:
0.75n = 15. Thus, n = 20.
Sanchez bought 20 books.
You're very close. However, the less steep line should go through (4,7) and not some point slightly above that location. Also, the shaded region should be above both dashed lines at the same time. So you won't include the portion that I've marked in blue (see attached). Other than that, it looks great.
The formula for the Binomial Theorem with a power 6 is as:

Thus, if we plug in 20 for x and 5 for y, our first term itself will be
which is much greater than 256 and thus it will not make any sense to use
to approximate 256 using the binomial theorem.
Also, it will not make any sense to use
as that has no power and we know that Binomial Theorem makes use of Power. Anyway,
.
Our best bet here would be to use the equation with power 8:

and have
and
which will give us

Answer:
990, C
Step-by-step explanation:
The formula for the surface area of the bottom cushion is
A = 2wl + 2lh + 2hw (w is width, l is length, h is height)
w = 18, l = 21, h = 3
A = 2(18)(21) + 2(21)(3) + 2(3)(18)
A = 2(378) + 2(63) + 2(54)
A = 756 + 126 + 108
A = 990 (C)
Solution:
As, we have to find ,
% of 20

If we have to Percent of a certain number it means , divide that number by 100 , for example x% means
.
And if i am writing , x% of y it means ,
.