Answer:
B:21
Step-by-step explanation:
Area of parallelogram=315=base ×hight .
base =x
hight= 15
15 × x = 315
x= 315/15
=21
I saw this some where before
John n. of stamps = N
Johan n. of stamps = n = Johnathan n. of stamps
2n = 5N -11
3n = 7N -3
So with some pen and paper work we get to the final result which is
N=27
n=62
A) 7480$ will be in the account at the end of one year.
B) $6460 will be in the account at the end of 2 years.
Answer:

Step-by-step explanation:
From the way the answers are presented, it can be seen that x refers to the radius of the base of the cone
radius: 
and we are told that the height is twice the radius, so:
height: 
and now we use the formula to calculate the volume of a cone:

where
is volume,
is radius, and
is the height. and
is a constant
in this case


so we substitute thisvalues in the formula for the volume:

Rearranging the terms

which is option A.