Circumference: radius
Circumference: twice the radius
We have the next formula to calculate the volume

where a is the length of the side in the base and h is the height
a=11cm
h=15cm
we substitue the values in the formula
The graph shows a number line marking all numbers less that 10.
Choice a:
<span>c + 7 ≤ 3
</span><span>c ≤ 3-7
</span><span>c ≤ -4
Choice a is a wrong choice
Choice b:
</span><span>c - 3 > 1
</span><span>c > 1+3
</span><span>c > 4
Choice b is a wrong choice
Choice c:
</span><span>c - 7 < 3
</span><span>c < 3+7
</span><span>c < 10
Choice c is the correct choice</span>
Given
A tea that is 22% jasmine is blended with a tea that is 13% jasmine
Find out the how many pounds of the 22% jasmine tea are used to make 10lb of tea that is 19.3% jasmine.
To proof
Let us assume that the a tea that is 22% jasmine is blended = a
Let us assume that the a tea that is 13% jasmine is blended = b
Total amount of tea made = 10lb
the equation be
a + b = 10
as given
jasmine tea are used to make 10lb of tea that is 19.3% jasmine.
write 22% in the decimal form

= 0.22
write 13% in the decimal form

= 0.13
write 19.3% in the decimal form

= 0.193
than the equation be
0.22a + 0.13b = 0.193 × 10
on simplify
22a + 13b = 193
two equation becomes
22a + 13b = 193 and a + b = 10
multiply a + b = 10 by 13 and subtracted from the 22a + 13b = 193
we get
22a - 13a + 13b -13b = 193 - 130
9a = 63
a = 7lb
put this value in the a + b = 10
we get
7 + b = 10
b = 3lb
Therefore the 22% jasmine tea are used to make 10lb of tea that is 19.3% jasmine is 7 lb .
Hence proved