Answer:
1386cm^2.
Step-by-step explanation:
radius of circle=21cm
area of circle(a)=?
we know,
A=pi r^2
=22/7×(21)^2
=1386cm^2
Answer:
5040
Step-by-step explanation:
I assume you really mean 7!
you understand what "!" means ?
n! = n×(n-1)×(n-2)×(n-3)×...×3×2×1
so,
7! = 7×6×5×4×3×2×1
now all you need is a calculator.
7! = 5040
Step 2 I believe. You are supposed to find the absolute value before adding
Answer:
96 cm^2 (centimetres squared)
Step-by-step explanation:
(7 x 3) x 2 = 42
6x2 / 2 x 2 = 12
6 x 7 = 42
42 + 12 + 42 = 96 cm^2