Answer:
90π cm²
Step-by-step explanation:
Given: Radius of circular base= 5 cm
height= 12 cm
Now finding the surface of cone.
Formula; Surface area of cone=
Where; r= radius
l= slant height
B is the area of base, which is circle.
Area of circle (B)= πr²
Area of circle (B)=
∴ Area of circle (B)=
Finding slant height (l)
Formula;
⇒l =
∴ l=
Next, using the formula for finding surface area of cone.
Surface area of cone=
⇒ Surface area of cone=
∴ Surface area of cone= 90π cm²
Answer:
S.A. = 90 pi cm2
Step-by-step explanation:
1. pi(3.14) x radius(5) x slant height(13) = 90
The two different ways of addition are mentioned above.
Given that,
To estimate 368+231 two different ways.
In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication, and division,
Here,
One way,
= 368 + 231
= 400 - 32 + 200 + 31
= 600 - 1
= 599
Second way
= 368 + 231
= 300 + 68 + 200 + 31
= 500 + 99
= 599
Thus, the two different ways of addition are mentioned above.
Learn more about arithmetic here:
#SPJ2
we know that
One very simple form of estimation is rounding.
To round off whole numbers:
Find the place value you want (the "rounding digit") and look to the digit just to the right of it.
If that digit is less than , do not change the "rounding digit" but change all digits to the right of the "rounding digit" to zero.
If that digit is greater than or equal to , add one to the rounding digit and change all digits to the right of the rounding digit to zero.
Part a) Estimate rounding the numbers to nearest hundreds
------> round up to
------> round down to
so
therefore
the answer part a) is
Part b) Estimate rounding the numbers to nearest tens
------> round up to
------> round down to
so
therefore
the answer part b) is
Answer:
A
Step-by-step explanation:
300 minus 15 ( times each week that passed) would equal how much she owes
Enter your answer as an integer, like this: 42