Answer:
22.14
Step-by-step explanation:
Using the Pythagorean Theorem:
a^2 + b^2 = c^2
21^2 + 7^2 = c^2
441 + 49 = c^2
490 = c^2 (square root both sides so c^2 becomes c)
c = 22.13594363 (round to hundredths)
c = 22.14
Answer: 6.44m squared
steps:
use A = l x w
A= ?
l = 2.8m
w = 2.3m
A = (2.8m)(2.3m)
= 6.44m^2
Its simple foil
(5-7i)(8+13i)
you should know i^2=-1
=40+65i-56i-91i^2
=131+9i
Answer:
B
Step-by-step explanation:
hope this helps
